$ git clone -n https://gitee.com/wenyuzifang/python-pyfakefs.git /var/lib/mock/dist-an23-build-464128-73881/root/chroot_tmpdir/scmroot/python-pyfakefs
Cloning into '/var/lib/mock/dist-an23-build-464128-73881/root/chroot_tmpdir/scmroot/python-pyfakefs'...
$ git fetch origin bc2f9909b6700fa5a3c6307e14be5af9bf65826c:KOJI_FETCH_HEAD
From https://gitee.com/wenyuzifang/python-pyfakefs
 * [new ref]         bc2f9909b6700fa5a3c6307e14be5af9bf65826c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bc2f990 Update code from upstream