Zimmerman, Songs of Irish Rebellion, gives 4 versions. Version A is the familiar one. Zimmerman says, published for the first time in The Nation in 1842. Text B is political but it is linked to O'Connell rather than 1798. Text B is from a broadside which had a MS note on the back - "Bought in Kilkenny in 1828."
There is also an interesting broadside usually attributed to Brereton, who sold broadsides in Dublin in the 1860-1870's, "A New Song Call'd the Gay Old Hag." It is also political but is different in text from the others. What is interesting is that if the song was originally a ribald song about an old hag (Colm O Lochlainn's book - More Street Ballads, Song No. 60 - quotes O'Sullivan as saying that the ribald verses about "The Tight Old Hag" are the original), then Brereton's version seems to be an interesting offshoot. I should note that O Lochlainn also quotes Sparling, Irish Minstrelsy, 1888 as saying that the version he gives is an authentic 1798 composition. I can't locate my copy of Sparling so I don't know what his version is.