Re: [PATCH v8 23/44] fetch.c: change s_update_ref to use a ref transaction

--- a/builtin/fetch.c
+++ b/builtin/fetch.c

@@ -384,15 +384,16 @@ static int s_update_ref(const char *action,
 	snprintf(msg, sizeof(msg), "%s: %s", rla, action);
 
 	errno = 0;
-	lock = lock_any_ref_for_update(ref->name,
-				       check_old ? ref->old_sha1 : NULL,
-				       0, NULL);
-	if (!lock)
-		return errno == ENOTDIR ? STORE_REF_ERROR_DF_CONFLICT :
-					  STORE_REF_ERROR_OTHER;
-	if (write_ref_sha1(lock, ref->new_sha1, msg) < 0)
+	transaction = ref_transaction_begin();
+	if (!transaction ||
+	    ref_transaction_update(transaction, ref->name, ref->new_sha1,
+				   ref->old_sha1, 0, check_old) ||
+	    ref_transaction_commit(transaction, msg, NULL)) {