$ git clone -n https://gitee.com/src-opencloudos-rpms/systemd.git /var/lib/mock/dist-oc9-build-100045-60738/root/chroot_tmpdir/scmroot/systemd
Cloning into '/var/lib/mock/dist-oc9-build-100045-60738/root/chroot_tmpdir/scmroot/systemd'...
$ git fetch origin 3edd2e8c3d73e49c2c9d802e749405f86fbd3f03:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/systemd
 * [new ref]         3edd2e8c3d73e49c2c9d802e749405f86fbd3f03 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3edd2e8 import systemd-255-5.tl4.ap.1