$ git clone -n https://gitee.com/src-opencloudos-rpms/brltty.git /var/lib/mock/dist-oc9-build-45860-14592/root/chroot_tmpdir/scmroot/brltty
Cloning into '/var/lib/mock/dist-oc9-build-45860-14592/root/chroot_tmpdir/scmroot/brltty'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/brltty
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3a6eb24 import brltty-6.4-2.tl4