Here's the other thread mentioned by mack/misophist:

thread.cfm?threadid=72812&messages=11

I have no idea how old the song is, or if indeed *anyone* knows how old, but it is definitely "traditional" in the sense that everyone who sings it seems to inject a variation or two.

The subject matter always seems to involve intoxication on illegal substances as a way to pass the time while incarcerated, and there's usually a verse fantasizing about converting the prison grounds to a marijuana farm.