$ git clone -n https://src.fedoraproject.org/rpms/ghc-reducers.git /var/lib/mock/f33-build-528900-64715/root/chroot_tmpdir/scmroot/ghc-reducers
Cloning into '/var/lib/mock/f33-build-528900-64715/root/chroot_tmpdir/scmroot/ghc-reducers'...
$ git reset --hard db78a5458a0fe0b4da27bbe10cafa3dd0dd5f5bc
HEAD is now at db78a54 - Second attempt - Rebuilt for https://fedoraproject.org/wiki/Fedora_33_Mass_Rebuild