These are all the lines I've found:
Asshole, asshole, a soldier I shall be
Too pissed, too pissed, two pistols on my knee
A fart, a fart, afar to wander free
F'king, f'king, for king and country,
Shit'ole, shit'ole, she told him not to go,
Her ass, her ass, harass them in the dark.
Eat shit, eat shit, each hit will find its mark.
A whore, a whore, a horse will carry me,
F'cue, F'cue, for curiosity
I'll fight for the ole cunt, fight for the ole cunt, fight for the ole country.