$ git clone -n https://src.fedoraproject.org/rpms/btrfs-progs.git /var/lib/mock/f38-build-719547-97180/root/chroot_tmpdir/scmroot/btrfs-progs
Cloning into '/var/lib/mock/f38-build-719547-97180/root/chroot_tmpdir/scmroot/btrfs-progs'...
$ git reset --hard 99f449d7049d6f7a78cdba4d42433a5155bb85e0
HEAD is now at 99f449d Update to 6.3.1