$ git clone -n https://src.fedoraproject.org/rpms/mpc.git /var/lib/mock/f31-build-56650-28239/root/chroot_tmpdir/scmroot/mpc
Cloning into '/var/lib/mock/f31-build-56650-28239/root/chroot_tmpdir/scmroot/mpc'...
$ git reset --hard b9f85810aa512829efd5f7cc71d470d10ce92a21
HEAD is now at b9f8581 - Rebuilt for https://fedoraproject.org/wiki/Fedora_30_Mass_Rebuild