The lyrics are referring to the siege of the 'Eureka Stockade' in 1854 in Australia.

Here is a website containing songs and poems about the event.
http://eurekasydney.com/songs.html

I had a quick look through the songs and did'nt see anything matching the lyrics you quoted but you can check them yourself incase i missed them.

...also, here is a link to a song which is not in the above list:
http://www.youtube.com/watch?v=g4TcuhdEidM

Happy Hunting

Al