$ git clone -n https://gitee.com/wenyuzifang/re2.git /var/lib/mock/dist-an23-build-472675-74118/root/chroot_tmpdir/scmroot/re2
Cloning into '/var/lib/mock/dist-an23-build-472675-74118/root/chroot_tmpdir/scmroot/re2'...
$ git fetch origin b75cb99046d1ee38c8064d531a64c31b28b6e675:KOJI_FETCH_HEAD
From https://gitee.com/wenyuzifang/re2
 * [new ref]         b75cb99046d1ee38c8064d531a64c31b28b6e675 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b75cb99 Update code from upstream