I remember the words as being:

Goodbye Dolly I must leave you,
Though it breaks my heart to go,
I am needed at the front dear,
At the front to fight the foe,
Hark I hear the bugle calling,
And I can no longer stay,
Goodbye Dolly I must leave you,
Goodbye Dolly Gray.

I've no idea if the song has verses though.

AndyG