$ git clone -n https://gitee.com/src-opencloudos-rpms/rear.git /var/lib/mock/dist-oc8-build-72756-48159/root/chroot_tmpdir/scmroot/rear
Cloning into '/var/lib/mock/dist-oc8-build-72756-48159/root/chroot_tmpdir/scmroot/rear'...
$ git fetch origin bee1c35f6a1457efddf157818a8451608b9f90b3:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/rear
 * [new ref]         bee1c35f6a1457efddf157818a8451608b9f90b3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bee1c35 import rear-2.6-11.tl3