$ git clone -n https://gitee.com/wenyuzifang/btrfs-progs.git /var/lib/mock/dist-an23-build-469621-74027/root/chroot_tmpdir/scmroot/btrfs-progs
Cloning into '/var/lib/mock/dist-an23-build-469621-74027/root/chroot_tmpdir/scmroot/btrfs-progs'...
$ git fetch origin fe1ac71a6e7285f72de3d95658a6baced63bc551:KOJI_FETCH_HEAD
From https://gitee.com/wenyuzifang/btrfs-progs
 * [new ref]         fe1ac71a6e7285f72de3d95658a6baced63bc551 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fe1ac71 Update code from upstream