This stanza sometimes introduces versions of 'The Keys of Heaven' but it is by no means certain that's where it originated. Like other add-ons above these things have a tendency to be tagged together especially in children's games. However if it is part of 'Keys of Heaven' there are Scottish versions 'Pennyworth of Preens' that have the Devil asking the questions, so you may well have something. Personally I think it's just staightforward and a piece of children's playfulness.