return error(_("Not a valid object name: '%s'"),
                                     argv[i]);
                }
-               if (!lookup_commit_reference(&oid)) {
+               if (!lookup_commit_reference(the_repository, &oid)) {
                        strbuf_release(&new_parents);
                        return error(_("could not parse %s"), argv[i]);
                }
        int i;
 
        hash_object_file(extra->value, extra->len, type_name(OBJ_TAG), &tag_oid);
-       tag = lookup_tag(&tag_oid);
+       tag = lookup_tag(the_repository, &tag_oid);
        if (!tag)
                return error(_("bad mergetag in commit '%s'"), ref);
-       if (parse_tag_buffer(tag, extra->value, extra->len))
+       if (parse_tag_buffer(the_repository, tag, extra->value, extra->len))
                return error(_("malformed mergetag in commit '%s'"), ref);
 
        /* iterate over new parents */
 
        if (get_oid(old_ref, &old_oid) < 0)
                return error(_("Not a valid object name: '%s'"), old_ref);
-       commit = lookup_commit_reference(&old_oid);
+       commit = lookup_commit_reference(the_repository, &old_oid);
        if (!commit)
                return error(_("could not parse %s"), old_ref);