$ git clone -n https://gitee.com/src-opencloudos-rpms/rubygem-racc.git /var/lib/mock/dist-oc9-build-44966-14591/root/chroot_tmpdir/scmroot/rubygem-racc
Cloning into '/var/lib/mock/dist-oc9-build-44966-14591/root/chroot_tmpdir/scmroot/rubygem-racc'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/rubygem-racc
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 47974ca import rubygem-racc-1.6.2-3.tl4