Never heard it sung - the only place I've found it is in that introduction by Geraldine Plunkett - it's one of two included there (she reckoned that they would have been "out of place in the text", presumably since it's a song rather than a poem as such)). It was originally published in the National Student, the magazine of the students of the University of Dublin.

The other one included is "The Foot and Mouth", which appears in Colm O Lochlann's Irtish Streets Ballads, with the tune given as "The Groves of Blarney". That would fit to this one as well, since the metre is identical. (I'll post the Foot and Mouth ballad here soon - what with the Mad Cow disease it's got a new kind of topicality.)

And there's a third ballad "better than either of these which follow, that it is perhaps too soon to publish." I think that has to mean it is more directly to do with rebellion. If anyone can point me to it anywhere, I'd love to see it.