$ git clone -n https://src.fedoraproject.org/rpms/rakudo.git /var/lib/mock/f31-build-96721-32870/root/thebuilddir/tmp/scmroot/rakudo
Cloning into '/var/lib/mock/f31-build-96721-32870/root/thebuilddir/tmp/scmroot/rakudo'...
$ git reset --hard 249c219865e3cf9ed255fdcc0386a4677a79a956
HEAD is now at 249c219 - Rebuilt for https://fedoraproject.org/wiki/Fedora_31_Mass_Rebuild