$ git clone -n https://src.fedoraproject.org/rpms/ghc-x509-system.git /var/lib/mock/f31-build-84218-31568/root/thebuilddir/tmp/scmroot/ghc-x509-system
Cloning into '/var/lib/mock/f31-build-84218-31568/root/thebuilddir/tmp/scmroot/ghc-x509-system'...
$ git reset --hard 898fc97efb5bb8782f9184fcdd2d29eb2632ee9f
HEAD is now at 898fc97 - Rebuilt for https://fedoraproject.org/wiki/Fedora_31_Mass_Rebuild