Merge branch 'bw/ref-prefix-for-configured-refspec'

* bw/ref-prefix-for-configured-refspec:
  fetch: do not pass ref-prefixes for fetch by exact SHA1

refspec.c

@@ -202,6 +202,8 @@ void refspec_ref_prefixes(const struct refspec *rs,
 		const struct refspec_item *item = &rs->items[i];
 		const char *prefix = NULL;
+		if (item->exact_sha1)
+			continue;
 		if (rs->fetch == REFSPEC_FETCH)
 			prefix = item->src;
 		else if (item->dst)

refspec.h

@@ -42,6 +42,10 @@ void refspec_clear(struct refspec *rs);
 int valid_fetch_refspec(const char *refspec);
 struct argv_array;
+/*
+ * Determine what <prefix> values to pass to the peer in ref-prefix lines
+ * (see Documentation/technical/protocol-v2.txt).
+ */
 void refspec_ref_prefixes(const struct refspec *rs,
 			  struct argv_array *ref_prefixes);

t/t5516-fetch-push.sh

@@ -1121,6 +1121,25 @@ test_expect_success 'fetch exact SHA1' '
 	)
 '
+test_expect_success 'fetch exact SHA1 in protocol v2' '
+	mk_test testrepo heads/master hidden/one &&
+	git push testrepo master:refs/hidden/one &&
+	git -C testrepo config transfer.hiderefs refs/hidden &&
+	check_push_result testrepo $the_commit hidden/one &&
+
+	mk_child testrepo child &&
+	git -C child config protocol.version 2 &&
+
+	# make sure $the_commit does not exist here
+	git -C child repack -a -d &&
+	git -C child prune &&
+	test_must_fail git -C child cat-file -t $the_commit &&
+
+	# fetching the hidden object succeeds by default
+	# NEEDSWORK: should this match the v0 behavior instead?
+	git -C child fetch -v ../testrepo $the_commit:refs/heads/copy
+'
+
 for configallowtipsha1inwant in true false
 do
 	test_expect_success "shallow fetch reachable SHA1 (but not a ref), allowtipsha1inwant=$configallowtipsha1inwant" '