$ git clone -n https://src.fedoraproject.org/rpms/ghc-stringbuilder.git /var/lib/mock/f31-build-54845-28065/root/chroot_tmpdir/scmroot/ghc-stringbuilder
Cloning into '/var/lib/mock/f31-build-54845-28065/root/chroot_tmpdir/scmroot/ghc-stringbuilder'...
$ git reset --hard 591d7d8f7391997f429b92ea2aaa5aeda16441d9
HEAD is now at 591d7d8 refresh to cabal-rpm-0.13