$ git clone -n https://gitee.com/src-opencloudos-rpms/firefox.git /var/lib/mock/dist-oc9-build-68083-46820/root/chroot_tmpdir/scmroot/firefox
Cloning into '/var/lib/mock/dist-oc9-build-68083-46820/root/chroot_tmpdir/scmroot/firefox'...
$ git fetch origin b868d8f23ff76f32040dbf0207db1c0f850385d1:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/firefox
 * [new ref]         b868d8f23ff76f32040dbf0207db1c0f850385d1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b868d8f Add auto-patch changlog