No, the Keeper isn't the song. The chorus line "Hey down and Ho Down" is repeated after every line. Each verse line is the exact same melody as the next verse line. The tune (very primitively) is as follows:

VERSE: D D B G G B C D

CHORUS: E D B A B A G G

VERSE: D D B G G B C D

CHORUS: E D B A B A G G

Over and over again. I am certain it is a Child Ballad.