$ git clone -n https://gitee.com/src-opencloudos-rpms/systemd.git /var/lib/mock/dist-oc9-build-235574-82162/root/chroot_tmpdir/scmroot/systemd
Cloning into '/var/lib/mock/dist-oc9-build-235574-82162/root/chroot_tmpdir/scmroot/systemd'...
$ git fetch origin c273464cc372985aafa88fe5dee5280dd7ade280:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/systemd
 * [new ref]         c273464cc372985aafa88fe5dee5280dd7ade280 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c273464 import systemd-255-20.tl4.ap.2