Great song, for some reasons there are struggles with the words. There are ways to reduce those struggles, and I've had a bit of practice with writing words from Leadbelly. A couple things - there are pump shotguns, and the "eatin' raw" words are followed by a laugh of observers during the recording, for obvious reasons - somebody at least understood the words as they were sang. This song closely follows the sentiments and gripes of the track I Don't Want No More Of Army Life. Here is my rendering, which I think is very close if not exact:

[Instrumental Prelude] (Then they got the invitation)

I'll be down on the last bread wagon
I'll be there with the hat in my hand
When the boys go to no man's land
I'll be there

But I won't be fightin'
I'll be there pumpin' shotgun shells
I won't be fightin'
But I'll be running like hell

When the boys goes over the top
I'll, be in the kitchen doin' the eatin' raw
I'm gonna beat 'em to the dugout
And dodge those shotgun shells

[Instrumental Interlude](Then they got the invitation)

I got sad news, honey (boom boom boom)
I'm gonna take you to the dancin' hall (boom boom boom)
Everything is sad, but it's fair
And all the soldiers will be there

I'll be down on the last bread wagon
I'll be there with the hat in my hand
When the boys go to no man's land
I'll be there

But I won't be fightin'
I'll be there pumpin' shotgun shells
I won't be fightin'
But I'll be running like hell

When the boys goes over the top
I'll, be in the kitchen doing the eatin' raw
I'm gonna beat 'em to the dugout,
And dodge those shotgun shells.

[Instrumental Finale] (pick it up now)