$ git clone -n https://gitee.com/src-opencloudos-rpms/groff.git /var/lib/mock/dist-oc9-build-41488-14591/root/chroot_tmpdir/scmroot/groff
Cloning into '/var/lib/mock/dist-oc9-build-41488-14591/root/chroot_tmpdir/scmroot/groff'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/groff
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5c45d12 import groff-1.22.4-5.tl4