$ git clone -n https://gitee.com/opencloudos-stream/ungoogled-chromium.git /var/lib/mock/dist-oc9-epol-build-254407-84398/root/chroot_tmpdir/scmroot/ungoogled-chromium
Cloning into '/var/lib/mock/dist-oc9-epol-build-254407-84398/root/chroot_tmpdir/scmroot/ungoogled-chromium'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/ungoogled-chromium
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d320b72 !11 Update ungoogled-chromium to 156.0.8078.79. Merge pull request !11 from brucezhang/master