$ git clone -n https://src.fedoraproject.org/rpms/ghc-base-prelude.git /var/lib/mock/f31-build-110757-34071/root/chroot_tmpdir/scmroot/ghc-base-prelude
Cloning into '/var/lib/mock/f31-build-110757-34071/root/chroot_tmpdir/scmroot/ghc-base-prelude'...
$ git reset --hard b9615fe02388c8ab2b9dfe5a7279009168488b9d
HEAD is now at b9615fe BR prof for lib and static for executable