I learnt this in my school days a from a guy named pidler(anglo Indian) who used to pee in his bed even though he was in grade 7. BtW my school was in kalimpong, India named Dr. Grahams Homes. Its a nice place up in the hilly region bordering Nepal and was opened up a scottish guy. Its more than 100 years old school now. The song goes..

Ashole, Ashole, A soldier went to war,
With a piss, with a piss, with a Pistol in his knee,
Fuck u, Fuck u, for a cu-rio-sity,
Fight for the cunt, fight for the cunt, fight for the cunt-ta-ry.

there was more but I forgot..

from
Rai,
Nepal