$ git clone -n https://gitee.com/src-opencloudos-rpms/perl-Ref-Util.git /var/lib/mock/dist-oc9-build-130077-78063/root/chroot_tmpdir/scmroot/perl-Ref-Util
Cloning into '/var/lib/mock/dist-oc9-build-130077-78063/root/chroot_tmpdir/scmroot/perl-Ref-Util'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/perl-Ref-Util
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5c3629d import perl-Ref-Util-0.204-8.tl4