$ git clone -n https://gitee.com/wenyuzifang/btrfs-progs.git /var/lib/mock/dist-an23-build-465895-73955/root/chroot_tmpdir/scmroot/btrfs-progs
Cloning into '/var/lib/mock/dist-an23-build-465895-73955/root/chroot_tmpdir/scmroot/btrfs-progs'...
$ git fetch origin 55d2ebb2059875c45fcf63463e8e5072b9254d6d:KOJI_FETCH_HEAD
From https://gitee.com/wenyuzifang/btrfs-progs
 * [new ref]         55d2ebb2059875c45fcf63463e8e5072b9254d6d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 55d2ebb Update code from upstream