this is the one

I'm not a smart feller,
I'm a smart feller's son
And I'll keep felling smarts
'Till the smart feller comes

I'm not a fog ducker,
I'm a fog ducker's son
And I'll keep ducking fogs
'Till the fog ducker comes.

I am not the fig plucker,
I'm a fig plucker's son.
And I'll keep plucking figs
'Till the fig plucker comes