OPT_BOOL(0, "mirror", &send_mirror, N_("mirror all refs")),
                OPT_BOOL('f', "force", &force_update, N_("force updates")),
                { OPTION_CALLBACK,
-                 0, "signed", &push_cert, "yes|no|if-asked", N_("GPG sign the push"),
+                 0, "signed", &push_cert, "(yes|no|if-asked)", N_("GPG sign the push"),
                  PARSE_OPT_OPTARG, option_parse_push_signed },
                OPT_STRING_LIST(0, "push-option", &push_options,
                                N_("server-specific"),