$ git clone -n https://gitee.com/src-opencloudos-rpms/mrtg.git /var/lib/mock/dist-oc8-build-249160-83782/root/chroot_tmpdir/scmroot/mrtg
Cloning into '/var/lib/mock/dist-oc8-build-249160-83782/root/chroot_tmpdir/scmroot/mrtg'...
$ git fetch origin c6b19146980e3aedbd919fe68550268c92eaad33:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/mrtg
 * [new ref]         c6b19146980e3aedbd919fe68550268c92eaad33 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c6b1914 import mrtg-2.17.7-1.tl3.1