$ git clone -n https://src.fedoraproject.org/rpms/mpfr.git /var/lib/mock/f31-build-56656-28239/root/chroot_tmpdir/scmroot/mpfr
Cloning into '/var/lib/mock/f31-build-56656-28239/root/chroot_tmpdir/scmroot/mpfr'...
$ git reset --hard 715bcf1e4e08ba6ade6c10a8b4e8e486a336fec2
HEAD is now at 715bcf1 - Rebuilt for https://fedoraproject.org/wiki/Fedora_30_Mass_Rebuild