It's been confirmed that this is a Kurt Cobain instrumental. This song was once thought to be fake, but it's not. The real title of the song is not known, though it's likely either a cover of a Leadbelly song or a Cobain original in homage to Leadbelly.
Besides this version of the song found on bootlegs such as Outcesticide IV and Dressed For Success, Krist jammed on the bass line from the song during 1990.02.14 after Love Buzz.
It's not known for certain if this song was played by Kurt or Krist.
from the bootleg "Outcesticide IV: Rape of the Vaults"