diff --git a/builtin/reflog.c b/builtin/reflog.c
index 09541d1c80..61795f22d5 100644
--- a/builtin/reflog.c
+++ b/builtin/reflog.c
@@ -629,8 +629,9 @@ static int cmd_reflog_expire(int argc, const char **argv, const char *prefix)
 		free_worktrees(worktrees);
 		for (i = 0; i < collected.nr; i++) {
 			struct collected_reflog *e = collected.e[i];
+
 			set_reflog_expiry_param(&cb.cmd, explicit_expiry, e->reflog);
-			status |= reflog_expire(e->reflog, &e->oid, flags,
+			status |= reflog_expire(e->reflog, NULL, flags,
 						reflog_expiry_prepare,
 						should_expire_reflog_ent,
 						reflog_expiry_cleanup,
@@ -642,13 +643,12 @@ static int cmd_reflog_expire(int argc, const char **argv, const char *prefix)
 
 	for (; i < argc; i++) {
 		char *ref;
-		struct object_id oid;
-		if (!dwim_log(argv[i], strlen(argv[i]), &oid, &ref)) {
+		if (!dwim_log(argv[i], strlen(argv[i]), NULL, &ref)) {
 			status |= error(_("%s points nowhere!"), argv[i]);
 			continue;
 		}
 		set_reflog_expiry_param(&cb.cmd, explicit_expiry, ref);
-		status |= reflog_expire(ref, &oid, flags,
+		status |= reflog_expire(ref, NULL, flags,
 					reflog_expiry_prepare,
 					should_expire_reflog_ent,
 					reflog_expiry_cleanup,
@@ -700,7 +700,6 @@ static int cmd_reflog_delete(int argc, const char **argv, const char *prefix)
 
 	for ( ; i < argc; i++) {
 		const char *spec = strstr(argv[i], "@{");
-		struct object_id oid;
 		char *ep, *ref;
 		int recno;
 
@@ -709,7 +708,7 @@ static int cmd_reflog_delete(int argc, const char **argv, const char *prefix)
 			continue;
 		}
 
-		if (!dwim_log(argv[i], spec - argv[i], &oid, &ref)) {
+		if (!dwim_log(argv[i], spec - argv[i], NULL, &ref)) {
 			status |= error(_("no reflog for '%s'"), argv[i]);
 			continue;
 		}
@@ -724,7 +723,7 @@ static int cmd_reflog_delete(int argc, const char **argv, const char *prefix)
 			cb.cmd.expire_total = 0;
 		}
 
-		status |= reflog_expire(ref, &oid, flags,
+		status |= reflog_expire(ref, NULL, flags,
 					reflog_expiry_prepare,
 					should_expire_reflog_ent,
 					reflog_expiry_cleanup,
diff --git a/refs.h b/refs.h
index 48970dfc7e..ddbf15f1c2 100644
--- a/refs.h
+++ b/refs.h
@@ -796,7 +796,7 @@ enum expire_reflog_flags {
  * expiration policy that is desired.
  *
  * reflog_expiry_prepare_fn -- Called once after the reference is
- *     locked.
+ *     locked. Called with the OID of the locked reference.
  *
  * reflog_expiry_should_prune_fn -- Called once for each entry in the
  *     existing reflog. It should return true iff that entry should be
diff --git a/refs/files-backend.c b/refs/files-backend.c
index fbcd0c790b..d81bda8bc2 100644
--- a/refs/files-backend.c
+++ b/refs/files-backend.c
@@ -3027,7 +3027,7 @@ static int expire_reflog_ent(struct object_id *ooid, struct object_id *noid,
 }
 
 static int files_reflog_expire(struct ref_store *ref_store,
-			       const char *refname, const struct object_id *oid,
+			       const char *refname, const struct object_id *unused_oid,
 			       unsigned int flags,
 			       reflog_expiry_prepare_fn prepare_fn,
 			       reflog_expiry_should_prune_fn should_prune_fn,
@@ -3044,6 +3044,7 @@ static int files_reflog_expire(struct ref_store *ref_store,
 	int status = 0;
 	int type;
 	struct strbuf err = STRBUF_INIT;
+	const struct object_id *oid;
 
 	memset(&cb, 0, sizeof(cb));
 	cb.flags = flags;
@@ -3055,12 +3056,13 @@ static int files_reflog_expire(struct ref_store *ref_store,
 	 * reference itself, plus we might need to update the
 	 * reference if --updateref was specified:
 	 */
-	lock = lock_ref_oid_basic(refs, refname, oid, &type, &err);
+	lock = lock_ref_oid_basic(refs, refname, NULL, &type, &err);
 	if (!lock) {
 		error("cannot lock ref '%s': %s", refname, err.buf);
 		strbuf_release(&err);
 		return -1;
 	}
+	oid = &lock->old_oid;
 
 	/*
 	 * When refs are deleted, their reflog is deleted before the
@@ -3104,6 +3106,7 @@ static int files_reflog_expire(struct ref_store *ref_store,
 		}
 	}
 
+	assert(!unused_oid);
 	(*prepare_fn)(refname, oid, cb.policy_cb);
 	refs_for_each_reflog_ent(ref_store, refname, expire_reflog_ent, &cb);
 	(*cleanup_fn)(cb.policy_cb);