$ git clone -n https://src.fedoraproject.org/rpms/libmatroska.git /var/lib/mock/f31-build-111938-34236/root/chroot_tmpdir/scmroot/libmatroska
Cloning into '/var/lib/mock/f31-build-111938-34236/root/chroot_tmpdir/scmroot/libmatroska'...
$ git reset --hard 31060bcaf0759f918d0b40896795943eb6d6ce7f
HEAD is now at 31060bc Merge branch 'f30' into f31