$ git clone -n https://gitee.com/src-opencloudos-rpms/realtime-setup.git /var/lib/mock/dist-oc9-build-44889-14591/root/chroot_tmpdir/scmroot/realtime-setup
Cloning into '/var/lib/mock/dist-oc9-build-44889-14591/root/chroot_tmpdir/scmroot/realtime-setup'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/realtime-setup
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2a36fec import realtime-setup-2.2.3-3.tl4