Whenever I get togther with friends and sing this we ahve to agree in advance on the last line of the chorus. The one I know is
Fare the well, my pretty girl, I'll see you in the morning

Who could ever forget the Holy Modal Rounders last verse
Saw uncle Tom with bald-hdeaded Sally
Saw Mary coming and he jumped back in the alley
Old Aunt Mary she's-a-built for speed
she's got everything that our uncle Tom needs, YES SIR