http://www.wolfetonesofficialsite.com/
Depending on the recording, this is sometimes played with a capo on the 2nd/3rd 
fret. But here's the chords as I can hear them anyway!

Am                          G          Am
I'll sing you a song of a row in the town,
           C             G           Em             Am  
When the green flag went up and the Crown rag came down,
            C            G                    Em 
'Twas the neatest and sweetest thing ever you saw, 
Am                         C              Am
When they played the great game they call Erin Go Bragh. 

Am                       G              Am
One of our comrades was down at Ring's end, 
          C         G        Em           Am
For the honor of Ireland to uphold and defend,
        C            G                     Em 
He had no veteran soldiers but volunteers raw,
Am                     C        Am 
Playing sweet Mauser music for Erin Go Bragh. 

God rest gallant Pearse and his comrades who died 
Tom Clark, MacDonagh, MacDiarmada, McBryde, 
And here's to James Connolly who gave one hurrah, 
And faced the machine guns for Erin Go Bragh. 

One brave foreign captain was ranting that day, 
Saying, "Give me one hour and I'll blow you away," 
But a big Mauser bullet got stuck in his jaw, 
And he died of lead poisoning in Erin Go Bragh. 

Old Ceannt and his comrades like lions at bay, 
From the South Dublin Union poured death and dismay, 
And what was their wrath when the invader men saw
All the dead khaki soldiers o'er Erin Go Bragh

Glory to Dublin, and to her renown, 
In the long generations her fame will go down, 
And our children will tell how their forefathers saw, 
The red blaze of freedom o'er Erin Go Braugh.

(Same chord pattern for each verse)