$ git clone -n https://src.fedoraproject.org/rpms/btrfs-progs.git /var/lib/mock/f31-build-111913-34228/root/chroot_tmpdir/scmroot/btrfs-progs
Cloning into '/var/lib/mock/f31-build-111913-34228/root/chroot_tmpdir/scmroot/btrfs-progs'...
$ git reset --hard 7d12fecf1af731d7fe0c9faf4d9651193688679b
HEAD is now at 7d12fec New upstream v5.2.1