code: def refresh(self, include_fields=None, exclude_fields=None,
          extra_fields=None):
          
          # pylint: disable=protected-access
          r = self.bugzilla._getbug(self.bug_id,
              include_fields=include_fields, exclude_fields=exclude_fields,
              extra_fields=self._bug_fields + (extra_fields or []))
          # pylint: enable=protected-access
          self._update_dict(r)
docs: Refresh the bug with the latest data from bugzilla