Regarding fetch --refetch. Why does it need to refetch all the objects and not just the missing ones? And in that case, is it not possible for such recovery to

Regarding fetch --refetch. Why does it need to refetch all the objects and not just the missing ones? And in that case, is it not possible for such recovery to be automatic without extra flags? Very often with these failures it’s really just a single tree-object that is missing.