A few other threads on Hobo's Lullaby:

Origins: Hobo's Lullaby (Goebel Reeves)
Req: Hobo's Lullaby /Oklahoma Hills (answered)
DT Entry (note: "tune is a harmony to Just Before the Battle, Mother")

And a few more on Just Before The Battle; currently no threads I'm finding, but two versions are in the DT:

Just Before the Battle Mother
Just Before the Battle Mother (Comedic Version) - note that this is close to several period versions of the song I've seen -- it's not a modern mockery.