$ git clone -n https://gitee.com/src-opencloudos-rpms/epol-release /var/lib/mock/dist-oc9-build-56840-15084/root/chroot_tmpdir/scmroot/epol-release
Cloning into '/var/lib/mock/dist-oc9-build-56840-15084/root/chroot_tmpdir/scmroot/epol-release'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/epol-release
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0f62b3b [9-4] Rebuild for OpenCloudOS