I also read Masota`s Link, and I wouldn`t argue that the song was altered to coincide with Daly`s death.
It wouldn`t be the first time that this has been done, all I can add is that I heard the song when a boy some 50 years ago and as my father was in the Connaught Rangers during WW1 he also associated the song with Daly. Ard Mhacha.