$ git clone -n https://gitee.com/src-opencloudos-rpms/systemd.git /var/lib/mock/dist-oc9-build-150091-79726/root/chroot_tmpdir/scmroot/systemd
Cloning into '/var/lib/mock/dist-oc9-build-150091-79726/root/chroot_tmpdir/scmroot/systemd'...
$ git fetch origin ce8ebec1f7568ad420c16996d6399b2d26442e14:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/systemd
 * [new ref]         ce8ebec1f7568ad420c16996d6399b2d26442e14 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ce8ebec import systemd-255-14.tl4.ap.1