diff --git a/builtin/checkout.c b/builtin/checkout.c
index 9416aa2450..9b49f0e413 100644
--- a/builtin/checkout.c
+++ b/builtin/checkout.c
@@ -702,10 +702,10 @@ static void update_refs_for_switch(const struct checkout_opts *opts,
 }
 
 static int add_pending_uninteresting_ref(const char *refname,
-					 const unsigned char *sha1,
+					 const struct object_id *oid,
 					 int flags, void *cb_data)
 {
-	add_pending_sha1(cb_data, refname, sha1, UNINTERESTING);
+	add_pending_sha1(cb_data, refname, oid->hash, UNINTERESTING);
 	return 0;
 }
 
@@ -784,8 +784,6 @@ static void orphaned_commit_warning(struct commit *old, struct commit *new)
 	struct rev_info revs;
 	struct object *object = &old->object;
 	struct object_array refs;
-	struct each_ref_fn_sha1_adapter wrapped_add_pending_uninteresting_ref =
-		{add_pending_uninteresting_ref, &revs};
 
 	init_revisions(&revs, NULL);
 	setup_revisions(0, NULL, &revs, NULL);
@@ -793,7 +791,7 @@ static void orphaned_commit_warning(struct commit *old, struct commit *new)
 	object->flags &= ~UNINTERESTING;
 	add_pending_object(&revs, object, sha1_to_hex(object->sha1));
 
-	for_each_ref(each_ref_fn_adapter, &wrapped_add_pending_uninteresting_ref);
+	for_each_ref(add_pending_uninteresting_ref, &revs);
 	add_pending_sha1(&revs, "HEAD", new->object.sha1, UNINTERESTING);
 
 	refs = revs.pending;