$ git clone -n https://src.fedoraproject.org/rpms/libdvdread.git /var/lib/mock/f31-build-58499-28457/root/chroot_tmpdir/scmroot/libdvdread
Cloning into '/var/lib/mock/f31-build-58499-28457/root/chroot_tmpdir/scmroot/libdvdread'...
$ git reset --hard f739a8a73a3f333bbc861c0e6247eaf79d6c1dd9
HEAD is now at f739a8a Merge branch 'f29'