$ git clone -n https://src.fedoraproject.org/rpms/ghc-base-compat.git /var/lib/mock/f40-build-741940-110424/root/chroot_tmpdir/scmroot/ghc-base-compat
Cloning into '/var/lib/mock/f40-build-741940-110424/root/chroot_tmpdir/scmroot/ghc-base-compat'...
$ git reset --hard fc09db0d025da05811ba4d04c740f8936a6d680a
HEAD is now at fc09db0 https://hackage.haskell.org/package/base-compat-0.12.3/changelog