$ git clone -n https://src.fedoraproject.org/rpms/btrfs-progs.git /var/lib/mock/f37-build-680259-76834/root/chroot_tmpdir/scmroot/btrfs-progs
Cloning into '/var/lib/mock/f37-build-680259-76834/root/chroot_tmpdir/scmroot/btrfs-progs'...
$ git reset --hard 0211491f0e9683d2f762658bedb56d43cb652b05
HEAD is now at 0211491 Update to 6.1.1