def refresh_sync_item(self, sync_item, **kwargs):
        """
        Refresh a sync item, ignoring all cached details and retrieving
        authorative data from the source systems again.
        """
        self._cache.delete_item(sync_item)
        kwargs = copy(kwargs)
        ...
        fill out contstructor params here
        ...
        new_sync_item = self.create(**kwargs)
        sync_item.importer = new_sync_item.importer
        sync_item.exporter = new_sync_item.exporter
        self._cache.store_item(sync_item)