comment about extra reclones

src/mobu/services/repo.py

@@ -149,6 +149,11 @@ async def invalidate(self, url: str, ref: str, repo_hash: str) -> None:
             info = self._cache.get(key)
             if info:
                 logger.info("Invalidating repo")
+
+                # Note that this could force an unnecessary clone if any monkey
+                # is calling invalidate in its shutdown method. This would
+                # force reclone for other monkeys that are using the same repo
+                # at the same hash.
                 del self._cache[key]
 
             count = self._references.get(reference)