$ git clone -n https://gitee.com/src-opencloudos-rpms/systemd.git /var/lib/mock/dist-oc9-build-67824-46582/root/chroot_tmpdir/scmroot/systemd
Cloning into '/var/lib/mock/dist-oc9-build-67824-46582/root/chroot_tmpdir/scmroot/systemd'...
$ git fetch origin c6539e1c237ef089d2c66b4957bbde70a037fc53:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/systemd
 * [new ref]         c6539e1c237ef089d2c66b4957bbde70a037fc53 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c6539e1 import systemd-253-7.tl4.1