$ git clone -n https://src.fedoraproject.org/rpms/btrfsd.git /var/lib/mock/f40-build-762872-122267/root/chroot_tmpdir/scmroot/btrfsd
Cloning into '/var/lib/mock/f40-build-762872-122267/root/chroot_tmpdir/scmroot/btrfsd'...
$ git reset --hard cb386847a2ef078b4b00cb85a558cc52e8327e8e
HEAD is now at cb38684 Update to 0.2.0