Perhaps your friend is pulling your leg, or someone has been pulling his. It's not impossible that such a song exists, but it does seem rather unlikely; unless it's a modern piece, of course, perhaps not widely-known. The Bodleian site is down just at present, but I'll have a look later on the offchance. Meanwhile, my suspicion would be that someone has half-remembered, and quite misunderstood, Richard Thompson's song  Sam Jones.