$ git clone -n https://src.fedoraproject.org/rpms/ghc-reducers.git /var/lib/mock/f40-build-744507-111739/root/chroot_tmpdir/scmroot/ghc-reducers
Cloning into '/var/lib/mock/f40-build-744507-111739/root/chroot_tmpdir/scmroot/ghc-reducers'...
$ git reset --hard 85b61591acf06b43062c38d1c295719fe84123b5
HEAD is now at 85b6159 revised .cabal file