My father and others used to sing it here in Australia. Just the other year I had to sing it at a lockdown in a pub in Dingle just down the road from Castlemaine and it took a few hours of thirsty discussion to get to an agreed understanding. There's a few different versions and of course all insist theirs is the correct one. The one I always heard was:

 
There was a wild colonial boy,
Jack Doolan was his name
Of poor but honest parents  
He was born in a Castlemaine
He was his father's only son,
his mother's pride and joy
And dearly did his parents love
the wild colonial boy 

At the tender age of sixteen years,
Jack left his native home
And to Australia's sunny shores,
a bushranger did roam
He robbed the lordly squatters 
and (mumble something) of their toys
A terror to Australia was
the wild colonial boy..

and so on.