$ git clone -n https://src.fedoraproject.org/rpms/ghc-Stream.git /var/lib/mock/f33-build-185188-45726/root/chroot_tmpdir/scmroot/ghc-Stream
Cloning into '/var/lib/mock/f33-build-185188-45726/root/chroot_tmpdir/scmroot/ghc-Stream'...
$ git reset --hard f75931ad4c42b27465882764774e149cf8c647d7
HEAD is now at f75931a refresh to cabal-rpm-2.0.2