$ git clone -n https://gitee.com/wenyuzifang/btrfs-progs.git /var/lib/mock/dist-an23-build-469251-74027/root/chroot_tmpdir/scmroot/btrfs-progs
Cloning into '/var/lib/mock/dist-an23-build-469251-74027/root/chroot_tmpdir/scmroot/btrfs-progs'...
$ git fetch origin 8f72d3b9406d3afd2e8d9c4d84c89374122999b7:KOJI_FETCH_HEAD
From https://gitee.com/wenyuzifang/btrfs-progs
 * [new ref]         8f72d3b9406d3afd2e8d9c4d84c89374122999b7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8f72d3b Update code from upstream