$ git clone -n https://src.fedoraproject.org/rpms/ghc-temporary.git /var/lib/mock/f31-build-117029-34599/root/chroot_tmpdir/scmroot/ghc-temporary
Cloning into '/var/lib/mock/f31-build-117029-34599/root/chroot_tmpdir/scmroot/ghc-temporary'...
$ git reset --hard 23110eb9a863b47e6879b239456a9bcda91c22ba
HEAD is now at 23110eb BR prof for lib and static for executable