$ git clone -n https://src.fedoraproject.org/rpms/ghc-reducers.git /var/lib/mock/f31-build-54779-28055/root/chroot_tmpdir/scmroot/ghc-reducers
Cloning into '/var/lib/mock/f31-build-54779-28055/root/chroot_tmpdir/scmroot/ghc-reducers'...
$ git reset --hard 48972312c78295fb6c20ff1115a9b3fc1229a69d
HEAD is now at 4897231 refresh to cabal-rpm-0.13