$ git clone -n https://src.fedoraproject.org/rpms/mpir.git /var/lib/mock/f31-build-56663-28239/root/chroot_tmpdir/scmroot/mpir
Cloning into '/var/lib/mock/f31-build-56663-28239/root/chroot_tmpdir/scmroot/mpir'...
$ git reset --hard b5f9b0f7de311cdee0c0f080c382b295528875f7
HEAD is now at b5f9b0f - Rebuilt for https://fedoraproject.org/wiki/Fedora_30_Mass_Rebuild