$ git clone -n https://gitee.com/bbrucezhang/ungoogled-chromium.git /var/lib/mock/dist-oc9-epol-build-236706-82318/root/chroot_tmpdir/scmroot/ungoogled-chromium
Cloning into '/var/lib/mock/dist-oc9-epol-build-236706-82318/root/chroot_tmpdir/scmroot/ungoogled-chromium'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/bbrucezhang/ungoogled-chromium
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0c2bf1a Add empty doc directory to prevent panic during installation when documentation is not built. This ensures smoother execution of the x.py install command.