This info can be found in the Online 78-rpm Discographical Project:

GEORGE WASHINGTON was recorded by Pope's Arkansas Mountaineers on 2/6/1928 and released on Victor 21469, b/w COTTON EYED JOE.

I'm not sure it's the same song, but the Frisco Jazz Band recorded something called GEORGE WASHINGTON around 1947, and it was released as Pacific 631, b/w GETTIN' MY BOOTS.