$ git clone -n https://src.fedoraproject.org/rpms/portreserve.git /var/lib/mock/f31-build-88766-32002/root/thebuilddir/tmp/scmroot/portreserve
Cloning into '/var/lib/mock/f31-build-88766-32002/root/thebuilddir/tmp/scmroot/portreserve'...
$ git reset --hard fe4d8cd4c012084635575e9b36e3a6eaabf18a87
HEAD is now at fe4d8cd - Rebuilt for https://fedoraproject.org/wiki/Fedora_31_Mass_Rebuild