Here's a version from Virginia. The refrains, as indicated in the first two stanzas, continue throughout. I had a look in Cox 'Folk-Songs of the South', but he has no version of this ballad.

WILD HOG IN THE WOODS
(Traditional)
^^^
There is a wild hog in the wood
Diddle o down, diddle o day
There is a wild hog in the wood
Diddle o, oooh
There is a wild hog in the wood
Kills a man and drinks his blood
Kam-o-kay, cut him down, kill him if you can

I wish I could that wild hog see
Diddle o …
I wish I could that wild hog see
Diddle o, oooh
I wish I could that wild hog see
And see if he'd take a fight with me
Kam-o-kay, …

There he comes through yonders marsh
He threads his way through oak and ash

Bangum drew his wooden knife
To rob that wild hog of his life

They fought four hours of the day
At length that wild hog stole away

They followed that wild hog to his den
And there found the bones of a thousand men

Source: transcription of recording of Eunice Yeattes McAlexander issued on Various Artists 'Virginia Traditions: Ballads from British Tradition' Global Village CD 1002. Recorded by Kip Lornell on 25 October 1976 in Meadows of Dan (Patrick County) Virginia. This lady was previously recorded by Dr Davis in 1932. Blue Ridge Institute recordings series.

--Stewie.