$ git clone -n https://gitee.com/src-opencloudos-rpms/gdm.git /var/lib/mock/dist-oc8-build-243560-83137/root/chroot_tmpdir/scmroot/gdm
Cloning into '/var/lib/mock/dist-oc8-build-243560-83137/root/chroot_tmpdir/scmroot/gdm'...
$ git fetch origin b6abc6fd0e7e8dd71aedacb11c9a884f82289560:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/gdm
 * [new ref]         b6abc6fd0e7e8dd71aedacb11c9a884f82289560 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b6abc6f import gdm-40.0-28.tl3