Re: [PATCH v3 2/3] Add function per_branch_config.

Jared Hance [off-list ref] writes:

Adds a configuration function to be filled up more in the next patch.

Again, "to be filled up more" is not the primary purpose of the new
function that was refactored from the existing one.  State what it does,
and what it is for instead, perhaps like...

    Split a part of the configuration callback into a separate function
    to handle per-branch configuration.