James N Healy in one of his books gives a chorus as:
With me Kerry-I-Oh-Whack fol di dol day
Kerr-i-Oh-Whack fol di dol day
He doesn't give a source - but was usually working from broadsheets. Which reminds me - not a ll the Bodleian ones are on-site at the moment so there may yet be a chorus among them.