$ git clone -n https://src.fedoraproject.org/rpms/ghc-X11.git /var/lib/mock/f31-build-53950-27926/root/thebuilddir/tmp/scmroot/ghc-X11
Cloning into '/var/lib/mock/f31-build-53950-27926/root/thebuilddir/tmp/scmroot/ghc-X11'...
$ git reset --hard f11cc450574f9cf1741f4d740f9149646a7a0291
HEAD is now at f11cc45 devel Requires libXScrnSaver-devel