There's one that was done at my school a few years ago, but I can only remember the chorus.. it's called "Pie in the Sky", to the tune of "In the Sweet By and By"

You will eat by and by
In that glorious (can't remember the word) in the sky
Chop some wood 'twill do you good
And (something something) pie in the sky

Slán,
Kiwi