$ git clone -n https://gitee.com/src-opencloudos-rpms/systemd /var/lib/mock/dist-oc9-donghua-build-123135-72778/root/chroot_tmpdir/scmroot/systemd
Cloning into '/var/lib/mock/dist-oc9-donghua-build-123135-72778/root/chroot_tmpdir/scmroot/systemd'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/systemd
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 81e383c import systemd-255-12.tl4.ap.1