Robb Johnson's "Rosa's Lovely Daughters": https://www.youtube.com/watch?v=ZD4C9kCiDT0

"Will the Circle Be Unbroken" (Nitty Gritty Dirt Band + Mother Maybelle Carter): https://www.youtube.com/watch?v=5eq1m2s3rzE

Yeah, I'd say it's more-or-less the same melody.