$ git clone -n https://gitee.com/src-opencloudos-rpms/librttopo.git /var/lib/mock/dist-oc9-build-53032-14748/root/chroot_tmpdir/scmroot/librttopo
Cloning into '/var/lib/mock/dist-oc9-build-53032-14748/root/chroot_tmpdir/scmroot/librttopo'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/librttopo
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a8761c6 import librttopo-1.1.0-2.tl4