$ git clone -n https://src.fedoraproject.org/rpms/ghc-data-hash.git /var/lib/mock/f31-build-93750-32433/root/thebuilddir/tmp/scmroot/ghc-data-hash
Cloning into '/var/lib/mock/f31-build-93750-32433/root/thebuilddir/tmp/scmroot/ghc-data-hash'...
$ git reset --hard 34758d392249d203d930530e1909cbaf01d8507e
HEAD is now at 34758d3 BR prof for lib and static for executable