$ git clone -n https://gitee.com/opencloudos-stream/mailx.git /var/lib/mock/dist-ocs23-build-41129-2059/root/chroot_tmpdir/scmroot/mailx
Cloning into '/var/lib/mock/dist-ocs23-build-41129-2059/root/chroot_tmpdir/scmroot/mailx'...
$ git fetch origin HEAD:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/mailx
 * [new ref]         HEAD       -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1ba61b4 update