Logging the matched SQL-Group

When rlm_sql is running through each of a user's groups, the value %{SQL-Group} is set for each iteration. However it's cleared at the end. I would like to be able to capture the value of SQL-Group which was successfully matched (if any), so that I can log it in rlm_sql_log. Is there a straightforward way of doing this? Because I can't see one right now... Thanks, Brian.