Not the one you're talking about but New Zealand has it's own song about postholes. I'm not sure if it's a true story or just a tall one but the idea of an empty railway wagon with Postholes written on the side has tickled quite a few people.

POSTHOLES
Tim Campbell (Field research, and song structure)
John Archer (Lyric development, and music) 1984
Tim was working as a shunter at the Milson Yards in Palmerston North in 1980. His boss kept annoying him by making him continually re-arrange a lot of empty goods wagons (freight cars). So Tim got rid of all the wagons...
C
My name's Sam and I'm a shunter;
       Am
Out at Milson I work wonders
      F                C             G
As I shuffle rakes of wagons to and fro
    C
But lately it's been tragic,
       Am
For despite computer magic
       F                   G7                  C
Those goods won't go where goods-trains used to go!

Chorus;
             F                              C   
For they're closing all the country sidings down
G                                  C F C
Tearing all the tracks out from the ground
      F
What am I going to do?
    C                   Am
To get these postholes through?
               D7             G7             C
Since they're closing all the country sidings down:

"Here's five hundred prefab postholes,
For a Mangaweka farmer,"
I wrote on some empty wagons in the yard.
"But they've built the deviation,
And closed old 'Weka station,
So we took them to Taihape," said the guard.

I sent postholes through the gorge,
To a fencer at Oringi,
But a phone call came from Dannevirke to say:
"Well, your wagons have arrived,
But we can't find a thing inside!
You'd better make a claim for postholes right away!"

So I thought I'd try again,
With some holes to Bonny Glen,
But they only got as far as Marton Yards,
Where they sent them on by road,
A whole truck and trailer load,
Now I've got to pay the double handling charge.
Chorus

Then a cocky back of Westmere
Said "Me postholes never got here"
Others turned up cracked and broken: clogged with sand.
That's why from Newman to Okoia
And up back of Mangahuia,
They've gone back to digging postholes out by hand.
Chorus


Robyn