$ git clone -n https://gitee.com/src-opencloudos-rpms/systemd.git /var/lib/mock/dist-oc9-build-124197-73783/root/chroot_tmpdir/scmroot/systemd
Cloning into '/var/lib/mock/dist-oc9-build-124197-73783/root/chroot_tmpdir/scmroot/systemd'...
$ git fetch origin 3be3a960c98a6254e67da1a311f538cd63146b32:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/systemd
 * [new ref]         3be3a960c98a6254e67da1a311f538cd63146b32 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3be3a96 import systemd-255-12.tl4.ap.1