diff --git a/builtin/fast-export.c b/builtin/fast-export.c
index 629d7c591a..50278bef7a 100644
--- a/builtin/fast-export.c
+++ b/builtin/fast-export.c
@@ -51,7 +51,7 @@ static int show_original_ids;
 static int mark_tags;
 static struct string_list extra_refs = STRING_LIST_INIT_DUP;
 static struct string_list tag_refs = STRING_LIST_INIT_DUP;
-static struct refspec refspecs = REFSPEC_INIT_FETCH;
+static struct refspec refspecs;
 static int anonymize;
 static struct hashmap anonymized_seeds;
 static struct revision_sources revision_sources;
@@ -1372,6 +1372,8 @@ int cmd_fast_export(int argc,
 	/* we handle encodings */
 	repo_config(the_repository, git_default_config, NULL);
 
+	refspec_init_fetch(&refspecs, the_hash_algo);
+
 	repo_init_revisions(the_repository, &revs, prefix);
 	init_revision_sources(&revision_sources);
 	revs.topo_order = 1;
diff --git a/builtin/fetch.c b/builtin/fetch.c
index 775a797074..ab7db2be06 100644
--- a/builtin/fetch.c
+++ b/builtin/fetch.c
@@ -96,7 +96,7 @@ static struct string_list deepen_not = STRING_LIST_INIT_NODUP;
 static struct strbuf default_rla = STRBUF_INIT;
 static struct transport *gtransport;
 static struct transport *gsecondary;
-static struct refspec refmap = REFSPEC_INIT_FETCH;
+static struct refspec refmap;
 static struct string_list server_options = STRING_LIST_INIT_DUP;
 static struct string_list negotiation_restrict = STRING_LIST_INIT_NODUP;
 static struct string_list negotiation_include = STRING_LIST_INIT_NODUP;
@@ -601,7 +601,8 @@ static struct ref *get_ref_map(struct remote *remote,
 		struct refspec_item tag_refspec;
 
 		/* also fetch all tags */
-		refspec_item_init_push(&tag_refspec, TAG_REFSPEC);
+		refspec_item_init_push(&tag_refspec, TAG_REFSPEC,
+				       the_hash_algo);
 		get_fetch_map(remote_refs, &tag_refspec, &tail, 0);
 		refspec_item_clear(&tag_refspec);
 	} else if (tags == TAGS_DEFAULT && *autotags) {
@@ -2428,7 +2429,7 @@ static int fetch_one(struct remote *remote, int argc, const char **argv,
 		     const struct fetch_config *config,
 		     struct list_objects_filter_options *filter_options)
 {
-	struct refspec rs = REFSPEC_INIT_FETCH;
+	struct refspec rs = REFSPEC_INIT_FETCH(the_hash_algo);
 	int i;
 	int exit_code;
 	int maybe_prune_tags;
@@ -2630,6 +2631,8 @@ int cmd_fetch(int argc,
 
 	filter_options.allow_auto_filter = 1;
 
+	refspec_init_fetch(&refmap, the_hash_algo);
+
 	packet_trace_identity("fetch");
 
 	/* Record the command line for the reflog */
diff --git a/builtin/pull.c b/builtin/pull.c
index d49b09114a..db3ee0aab3 100644
--- a/builtin/pull.c
+++ b/builtin/pull.c
@@ -612,7 +612,7 @@ static const char *get_tracking_branch(const char *remote, const char *refspec)
 	const char *spec_src;
 	const char *merge_branch;
 
-	if (!refspec_item_init_fetch(&spec, refspec))
+	if (!refspec_item_init_fetch(&spec, refspec, the_hash_algo))
 		die(_("invalid refspec '%s'"), refspec);
 	spec_src = spec.src;
 	if (!*spec_src || !strcmp(spec_src, "HEAD"))
diff --git a/builtin/push.c b/builtin/push.c
index 1b2ad3b8df..8ccdb07c40 100644
--- a/builtin/push.c
+++ b/builtin/push.c
@@ -66,7 +66,7 @@ static enum transport_family family;
 
 static struct push_cas_option cas;
 
-static struct refspec rs = REFSPEC_INIT_PUSH;
+static struct refspec rs;
 
 static struct string_list push_options_config = STRING_LIST_INIT_DUP;
 
@@ -749,6 +749,8 @@ int cmd_push(int argc,
 		: &push_options_config);
 	set_push_cert_flags(&flags, push_cert);
 
+	refspec_init_push(&rs, the_hash_algo);
+
 	die_for_incompatible_opt4(deleterefs, "--delete",
 				  tags, "--tags",
 				  flags & TRANSPORT_PUSH_ALL, "--all/--branches",
@@ -855,7 +857,7 @@ int cmd_push(int argc,
 			}
 
 			refspec_clear(&rs);
-			rs = (struct refspec) REFSPEC_INIT_PUSH;
+			rs = (struct refspec) REFSPEC_INIT_PUSH(the_hash_algo);
 
 			if (tags)
 				refspec_append(&rs, "refs/tags/*");
diff --git a/builtin/send-pack.c b/builtin/send-pack.c
index 1412b49bc8..d6cdbae472 100644
--- a/builtin/send-pack.c
+++ b/builtin/send-pack.c
@@ -153,7 +153,7 @@ int cmd_send_pack(int argc,
 		  const char *prefix,
 		  struct repository *repo)
 {
-	struct refspec rs = REFSPEC_INIT_PUSH;
+	struct refspec rs;
 	const char *remote_name = NULL;
 	struct remote *remote = NULL;
 	const char *dest = NULL;
@@ -214,6 +214,9 @@ int cmd_send_pack(int argc,
 
 	repo_config(repo, send_pack_config, NULL);
 	argc = parse_options(argc, argv, prefix, options, send_pack_usage, 0);
+
+	refspec_init_push(&rs, repo->hash_algo);
+
 	if (argc > 0) {
 		dest = argv[0];
 		refspec_appendn(&rs, argv + 1, argc - 1);
diff --git a/builtin/submodule--helper.c b/builtin/submodule--helper.c
index 65222706ea..e7cd3225fa 100644
--- a/builtin/submodule--helper.c
+++ b/builtin/submodule--helper.c
@@ -3151,7 +3151,7 @@ static int push_check(int argc, const char **argv, const char *prefix UNUSED,
 	if (argc > 2) {
 		int i;
 		struct ref *local_refs = get_local_heads();
-		struct refspec refspec = REFSPEC_INIT_PUSH;
+		struct refspec refspec = REFSPEC_INIT_PUSH(the_hash_algo);
 
 		refspec_appendn(&refspec, argv + 2, argc - 2);
 
diff --git a/http-push.c b/http-push.c
index 60f6f8f054..94a1fac9ab 100644
--- a/http-push.c
+++ b/http-push.c
@@ -1716,7 +1716,7 @@ int cmd_main(int argc, const char **argv)
 {
 	struct transfer_request *request;
 	struct transfer_request *next_request;
-	struct refspec rs = REFSPEC_INIT_PUSH;
+	struct refspec rs = REFSPEC_INIT_PUSH(the_hash_algo);
 	struct remote_lock *ref_lock = NULL;
 	struct remote_lock *info_ref_lock = NULL;
 	int delete_branch = 0;
diff --git a/refspec.c b/refspec.c
index fb89bce1db..7cb479983b 100644
--- a/refspec.c
+++ b/refspec.c
@@ -1,4 +1,3 @@
-#define USE_THE_REPOSITORY_VARIABLE
 #define DISABLE_SIGN_COMPARE_WARNINGS
 
 #include "git-compat-util.h"
@@ -16,7 +15,8 @@
  * Parses the provided refspec 'refspec' and populates the refspec_item 'item'.
  * Returns 1 if successful and 0 if the refspec is invalid.
  */
-static int parse_refspec(struct refspec_item *item, const char *refspec, int fetch)
+static int parse_refspec(struct refspec_item *item, const char *refspec,
+			 const struct git_hash_algo *algo, int fetch)
 {
 	size_t llen;
 	int is_glob;
@@ -84,7 +84,7 @@ static int parse_refspec(struct refspec_item *item, const char *refspec, int fet
 		 */
 		if (!*item->src)
 			return 0; /* negative refspecs must not be empty */
-		else if (llen == the_hash_algo->hexsz && !get_oid_hex(item->src, &unused))
+		else if (llen == algo->hexsz && !get_oid_hex_algop(item->src, &unused, algo))
 			return 0; /* negative refspecs cannot be exact sha1 */
 		else if (!check_refname_format(item->src, flags))
 			; /* valid looking ref is ok */
@@ -101,7 +101,7 @@ static int parse_refspec(struct refspec_item *item, const char *refspec, int fet
 		/* LHS */
 		if (!*item->src)
 			; /* empty is ok; it means "HEAD" */
-		else if (llen == the_hash_algo->hexsz && !get_oid_hex(item->src, &unused))
+		else if (llen == algo->hexsz && !get_oid_hex_algop(item->src, &unused, algo))
 			item->exact_sha1 = 1; /* ok */
 		else if (!check_refname_format(item->src, flags))
 			; /* valid looking ref is ok */
@@ -154,21 +154,23 @@ static int parse_refspec(struct refspec_item *item, const char *refspec, int fet
 }
 
 static int refspec_item_init(struct refspec_item *item, const char *refspec,
-			     int fetch)
+			     const struct git_hash_algo *algo, int fetch)
 {
 	memset(item, 0, sizeof(*item));
 	item->raw = xstrdup(refspec);
-	return parse_refspec(item, refspec, fetch);
+	return parse_refspec(item, refspec, algo, fetch);
 }
 
-int refspec_item_init_fetch(struct refspec_item *item, const char *refspec)
+int refspec_item_init_fetch(struct refspec_item *item, const char *refspec,
+			    const struct git_hash_algo *algo)
 {
-	return refspec_item_init(item, refspec, 1);
+	return refspec_item_init(item, refspec, algo, 1);
 }
 
-int refspec_item_init_push(struct refspec_item *item, const char *refspec)
+int refspec_item_init_push(struct refspec_item *item, const char *refspec,
+			   const struct git_hash_algo *algo)
 {
-	return refspec_item_init(item, refspec, 0);
+	return refspec_item_init(item, refspec, algo, 0);
 }
 
 void refspec_item_clear(struct refspec_item *item)
@@ -182,15 +184,15 @@ void refspec_item_clear(struct refspec_item *item)
 	item->exact_sha1 = 0;
 }
 
-void refspec_init_fetch(struct refspec *rs)
+void refspec_init_fetch(struct refspec *rs, const struct git_hash_algo *algo)
 {
-	struct refspec blank = REFSPEC_INIT_FETCH;
+	struct refspec blank = REFSPEC_INIT_FETCH(algo);
 	memcpy(rs, &blank, sizeof(*rs));
 }
 
-void refspec_init_push(struct refspec *rs)
+void refspec_init_push(struct refspec *rs, const struct git_hash_algo *algo)
 {
-	struct refspec blank = REFSPEC_INIT_PUSH;
+	struct refspec blank = REFSPEC_INIT_PUSH(algo);
 	memcpy(rs, &blank, sizeof(*rs));
 }
 
@@ -200,9 +202,9 @@ void refspec_append(struct refspec *rs, const char *refspec)
 	int ret;
 
 	if (rs->fetch)
-		ret = refspec_item_init_fetch(&item, refspec);
+		ret = refspec_item_init_fetch(&item, refspec, rs->hash_algo);
 	else
-		ret = refspec_item_init_push(&item, refspec);
+		ret = refspec_item_init_push(&item, refspec, rs->hash_algo);
 	if (!ret)
 		die(_("invalid refspec '%s'"), refspec);
 
@@ -246,10 +248,11 @@ void refspec_clear(struct refspec *rs)
 	rs->fetch = 0;
 }
 
-int valid_fetch_refspec(const char *fetch_refspec_str)
+int valid_fetch_refspec(const char *fetch_refspec_str,
+			const struct git_hash_algo *algo)
 {
 	struct refspec_item refspec;
-	int ret = refspec_item_init_fetch(&refspec, fetch_refspec_str);
+	int ret = refspec_item_init_fetch(&refspec, fetch_refspec_str, algo);
 	refspec_item_clear(&refspec);
 	return ret;
 }
diff --git a/refspec.h b/refspec.h
index 8b04f9995e..fadef67933 100644
--- a/refspec.h
+++ b/refspec.h
@@ -1,6 +1,10 @@
 #ifndef REFSPEC_H
 #define REFSPEC_H
 
+struct git_hash_algo;
+struct string_list;
+struct strvec;
+
 #define TAG_REFSPEC "refs/tags/*:refs/tags/*"
 
 /**
@@ -30,10 +34,11 @@ struct refspec_item {
 	char *raw;
 };
 
-struct string_list;
-
-#define REFSPEC_INIT_FETCH { .fetch = 1 }
-#define REFSPEC_INIT_PUSH { .fetch = 0 }
+int refspec_item_init_fetch(struct refspec_item *item, const char *refspec,
+			    const struct git_hash_algo *algo);
+int refspec_item_init_push(struct refspec_item *item, const char *refspec,
+			   const struct git_hash_algo *algo);
+void refspec_item_clear(struct refspec_item *item);
 
 /**
  * An array of strings can be parsed into a struct refspec using
@@ -44,23 +49,30 @@ struct refspec {
 	int alloc;
 	int nr;
 
+	const struct git_hash_algo *hash_algo;
 	unsigned fetch : 1;
 };
 
-int refspec_item_init_fetch(struct refspec_item *item, const char *refspec);
-int refspec_item_init_push(struct refspec_item *item, const char *refspec);
-void refspec_item_clear(struct refspec_item *item);
-void refspec_init_fetch(struct refspec *rs);
-void refspec_init_push(struct refspec *rs);
+#define REFSPEC_INIT_FETCH(algo) { \
+	.fetch = 1, \
+	.hash_algo = (algo), \
+}
+#define REFSPEC_INIT_PUSH(algo) { \
+	.fetch = 0, \
+	.hash_algo = (algo), \
+}
+
+void refspec_init_fetch(struct refspec *rs, const struct git_hash_algo *hash_algo);
+void refspec_init_push(struct refspec *rs, const struct git_hash_algo *hash_algo);
+void refspec_clear(struct refspec *rs);
+
 void refspec_append(struct refspec *rs, const char *refspec);
 __attribute__((format (printf,2,3)))
 void refspec_appendf(struct refspec *rs, const char *fmt, ...);
 void refspec_appendn(struct refspec *rs, const char **refspecs, int nr);
-void refspec_clear(struct refspec *rs);
 
-int valid_fetch_refspec(const char *refspec);
+int valid_fetch_refspec(const char *refspec, const struct git_hash_algo *algo);
 
-struct strvec;
 /*
  * Determine what <prefix> values to pass to the peer in ref-prefix lines
  * (see linkgit:gitprotocol-v2[5]).
@@ -76,7 +88,7 @@ int refname_matches_negative_refspec_item(const char *refname, struct refspec *r
  * Returns 1 if refname matches pattern, 0 otherwise.
  */
 int match_refname_with_pattern(const char *pattern, const char *refname,
-				   const char *replacement, char **result);
+			       const char *replacement, char **result);
 
 /*
  * Queries a refspec for a match and updates the query item.
@@ -89,8 +101,8 @@ int refspec_find_match(struct refspec *rs, struct refspec_item *query);
  * list.
  */
 void refspec_find_all_matches(struct refspec *rs,
-				    struct refspec_item *query,
-				    struct string_list *results);
+			      struct refspec_item *query,
+			      struct string_list *results);
 
 /*
  * Remove all entries in the input list which match any negative refspec in
diff --git a/remote.c b/remote.c
index b17648d6ef..f98278ee86 100644
--- a/remote.c
+++ b/remote.c
@@ -150,8 +150,8 @@ static struct remote *make_remote(struct remote_state *remote_state,
 	ret->prune = -1;  /* unspecified */
 	ret->prune_tags = -1;  /* unspecified */
 	ret->name = xstrndup(name, len);
-	refspec_init_push(&ret->push);
-	refspec_init_fetch(&ret->fetch);
+	refspec_init_push(&ret->push, the_hash_algo);
+	refspec_init_fetch(&ret->fetch, the_hash_algo);
 	string_list_init_dup(&ret->server_options);
 	string_list_init_dup(&ret->negotiation_restrict);
 	string_list_init_dup(&ret->negotiation_include);
@@ -3041,7 +3041,7 @@ int valid_remote_name(const char *name)
 	int result;
 	struct strbuf refspec = STRBUF_INIT;
 	strbuf_addf(&refspec, "refs/heads/test:refs/remotes/%s/test", name);
-	result = valid_fetch_refspec(refspec.buf);
+	result = valid_fetch_refspec(refspec.buf, the_hash_algo);
 	strbuf_release(&refspec);
 	return result;
 }
diff --git a/transport-helper.c b/transport-helper.c
index 80f90eb7ba..8a25707b03 100644
--- a/transport-helper.c
+++ b/transport-helper.c
@@ -162,7 +162,7 @@ static struct child_process *get_helper(struct transport *transport)
 
 	data->helper = helper;
 	data->no_disconnect_req = 0;
-	refspec_init_fetch(&data->rs);
+	refspec_init_fetch(&data->rs, the_hash_algo);
 
 	/*
 	 * Open the output as FILE* so strbuf_getline_*() family of