$ git clone -n https://gitee.com/wenyuzifang/btrfs-progs.git /var/lib/mock/dist-an23-build-461304-73770/root/chroot_tmpdir/scmroot/btrfs-progs
Cloning into '/var/lib/mock/dist-an23-build-461304-73770/root/chroot_tmpdir/scmroot/btrfs-progs'...
$ git fetch origin d0f3038c97f8448d06af3f106a28689bf8087001:KOJI_FETCH_HEAD
From https://gitee.com/wenyuzifang/btrfs-progs
 * [new ref]         d0f3038c97f8448d06af3f106a28689bf8087001 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d0f3038 Update code from upstream