$ git clone -n https://src.fedoraproject.org/rpms/ghc-pattern-arrows.git /var/lib/mock/f31-build-54707-28038/root/chroot_tmpdir/scmroot/ghc-pattern-arrows
Cloning into '/var/lib/mock/f31-build-54707-28038/root/chroot_tmpdir/scmroot/ghc-pattern-arrows'...
$ git reset --hard 0979c2b91025af9146261084c50fee5b830d28dc
HEAD is now at 0979c2b refresh to cabal-rpm-0.13