$ git clone -n https://src.fedoraproject.org/rpms/ghc-attempt.git /var/lib/mock/f31-build-93617-32420/root/chroot_tmpdir/scmroot/ghc-attempt
Cloning into '/var/lib/mock/f31-build-93617-32420/root/chroot_tmpdir/scmroot/ghc-attempt'...
$ git reset --hard 6abf04eefc4f26795e56e8e6a19579617d428dea
HEAD is now at 6abf04e BR prof for lib and static for executable