Merge branch 'bc/maint-fetch-url-only'

* bc/maint-fetch-url-only:
  builtin/fetch.c: ignore merge config when not fetching from branch's remote
  t/t5510: demonstrate failure to fetch when current branch has merge ref

builtin/fetch.c

@@ -146,7 +146,9 @@ static struct ref *get_ref_map(struct transport *transport,
 		struct remote *remote = transport->remote;
 		struct branch *branch = branch_get(NULL);
 		int has_merge = branch_has_merge_config(branch);
-		if (remote && (remote->fetch_refspec_nr || has_merge)) {
+		if (remote &&
+		    (remote->fetch_refspec_nr ||
+		     (has_merge && !strcmp(branch->remote_name, remote->name)))) {
 			for (i = 0; i < remote->fetch_refspec_nr; i++) {
 				get_fetch_map(remote_refs, &remote->fetch[i], &tail, 0);
 				if (remote->fetch[i].dst &&

t/t5510-fetch.sh

@@ -240,6 +240,12 @@ test_expect_success 'fetch with a non-applying branch.<name>.merge' '
 	git fetch blub
 '
 
+test_expect_success 'fetch from GIT URL with a non-applying branch.<name>.merge' '
+	git update-ref -d FETCH_HEAD &&
+	git fetch one &&
+	git rev-parse --verify FETCH_HEAD
+'
+
 # the strange name is: a\!'b
 test_expect_success 'quoting of a strangely named repo' '
 	test_must_fail git fetch "a\\!'\''b" > result 2>&1 &&