Re: [PATCH v3 2/2] builtin/pack-objects.c: introduce `pack.recentObjectsHook`

> > I suspect both could be fixed by having git-prune trigger the same
> > add_unseen_recent_objects_to_traversal() call either as part of
> > the perform_reachability_traversal() walk, or maybe in its own walk (I
> > think maybe it has to be its own because the second walk should avoid
> > complaining about missing objects).
> 
> I might be missing something, but I think we already (kind of) do the
> right thing here.
> 
> AFAICT, the path is:
> 
>   - cmd_prune()
>   - for_each_loose_file_in_objdir()
>   - prune_object() (as a callback to the above)
>   - is_object_reachable()
>   - perform_reachability_traversal()
>   - mark_reachable_objects()
>   - add_unseen_recent_objects_to_traversal()
> 
> That only happens when `mark_recent != 0`, though.