clone: convert cmd_clone to use refspec_item_init

Convert 'cmd_clone()' to use 'refspec_item_init()' instead of relying on
the old 'parse_fetch_refspec()' to initialize a single refspec item.

Signed-off-by: Brandon Williams <bmwill@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

builtin/clone.c

@@ -895,8 +895,7 @@ int cmd_clone(int argc, const char **argv, const char *prefix)
 	int err = 0, complete_refs_before_fetch = 1;
 	int submodule_progress;
 
-	struct refspec_item *refspec;
-	const char *fetch_pattern;
+	struct refspec_item refspec;
 
 	fetch_if_missing = 0;
 
@@ -1078,8 +1077,7 @@ int cmd_clone(int argc, const char **argv, const char *prefix)
 	if (option_required_reference.nr || option_optional_reference.nr)
 		setup_reference();
 
-	fetch_pattern = value.buf;
-	refspec = parse_fetch_refspec(1, &fetch_pattern);
+	refspec_item_init(&refspec, value.buf, REFSPEC_FETCH);
 
 	strbuf_reset(&value);
 
@@ -1139,7 +1137,7 @@ int cmd_clone(int argc, const char **argv, const char *prefix)
 	refs = transport_get_remote_refs(transport, NULL);
 
 	if (refs) {
-		mapped_refs = wanted_peer_refs(refs, refspec);
+		mapped_refs = wanted_peer_refs(refs, &refspec);
 		/*
 		 * transport_get_remote_refs() may return refs with null sha-1
 		 * in mapped_refs (see struct transport->get_refs_list
@@ -1233,6 +1231,6 @@ int cmd_clone(int argc, const char **argv, const char *prefix)
 	strbuf_release(&value);
 	junk_mode = JUNK_LEAVE_ALL;
 
-	free(refspec);
+	refspec_item_clear(&refspec);
 	return err;
 }