$ git clone -n https://src.fedoraproject.org/rpms/ghc-extra.git /var/lib/mock/f31-build-54325-27988/root/chroot_tmpdir/scmroot/ghc-extra
Cloning into '/var/lib/mock/f31-build-54325-27988/root/chroot_tmpdir/scmroot/ghc-extra'...
$ git reset --hard ffced843dceaa222739c4545c01c6da72fcb6eeb
HEAD is now at ffced84 update to 1.6.14