$ git clone -n https://gitee.com/wenyuzifang/rpm-ostree.git /var/lib/mock/dist-an23-build-464730-73881/root/chroot_tmpdir/scmroot/rpm-ostree
Cloning into '/var/lib/mock/dist-an23-build-464730-73881/root/chroot_tmpdir/scmroot/rpm-ostree'...
$ git fetch origin 7d320a9286951aaa030913e3c40e31d561162e16:KOJI_FETCH_HEAD
From https://gitee.com/wenyuzifang/rpm-ostree
 * [new ref]         7d320a9286951aaa030913e3c40e31d561162e16 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7d320a9 Update code from upstream