$ git clone -n https://gitee.com/src-opencloudos-rpms/systemd.git /var/lib/mock/dist-oc9-build-246864-83500/root/chroot_tmpdir/scmroot/systemd
Cloning into '/var/lib/mock/dist-oc9-build-246864-83500/root/chroot_tmpdir/scmroot/systemd'...
$ git fetch origin da87f805da3cd6cf04832de881d03615a5bb6699:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/systemd
 * [new ref]         da87f805da3cd6cf04832de881d03615a5bb6699 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at da87f80 import systemd-255-20.tl4.ap.3