Interesting how much information there is about this on the web. The formal term is evidently koedoebokdrolverspoeg, but informally the sport is known as koedoedrolspoeg. I am assuming a pronunctiation of co-doe-droll-spo, and the tune is "Down in the Valley"

DUNG IN THE BUSHVELD

Down on the bushveld, what is that smell?
Pellets are flying, or so they tell.
Pellets of dung, dear, spit high or low
And they will call it, koedoedrolspoeg!

chorus:
Koedoedrolspoeg, Dear, koedoedrolspoeg!
Pellets are flying, koedoebokdrolverspoe!
Spit out the dung, dear, spit out the dung
run up to the sleeper*, and spit out the dung

The kudu has horns dear, that grow in a twist
But that's not the end, dear, that gives you to spit
The kudu eats mopane, acacia and grass
And your ammunition, falls out of it's ass

chorus

You choose just the right one, and soak it in beer
Or mampoer or witblitz, or liqour that's clear
Put back a few glasses, to get up your nerve
then pop in the pellet, and spit out with verve

chorus:
A good shot's nine meters, The best is fourteen
Now why is the audience, all turning green?
Try not to inhale,dear, it's really bad style
but you'll get the hang of it, after a while

chorus

* A railroad tie, or "sleeper" is used to mark the firing line