For some strange reason, my zigzaging memory went right to this. Then I found it on the internet so I could be sure of getting it right:

From 1001 Ways to Beat the Draft by Tuli Kupferberg and Robert Bashlow

786 Sing this song:

Asshole, asshole, a soldier I will be

Fuck you, fuck you, for curiosity,

With piss, with piss, with pistols on my knee

To fight for cunt, to fight for cunt, to fight for

cunterie.

Available here.