$ git clone -n https://gitee.com/src-opencloudos-rpms/rear.git /var/lib/mock/dist-oc8-build-74506-50638/root/chroot_tmpdir/scmroot/rear
Cloning into '/var/lib/mock/dist-oc8-build-74506-50638/root/chroot_tmpdir/scmroot/rear'...
$ git fetch origin 3776628398d5af8f250a38cc1e4fedef0fbdf577:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/rear
 * [new ref]         3776628398d5af8f250a38cc1e4fedef0fbdf577 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3776628 import rear-2.6-12.tl3