Found this on another site, it was news to me :)

After the original ANZAC battalions had landed at Gallipoli and been fighting for a while they were starting to suffer from scurvy.

The Aussies had taken all the oranges in the region and the British had already spoken for the entire lime stocks, so the NZers had to settle for the now famous brown furry fruit. A daring resupply mission was mounted, and despite heavy losses the front lines now had enough vitamin C to keep fighting.

The Australians would make fun of the NZers from then on and call them Kiwis - but the NZers had the last laugh. Turkish snipers found it very easy to target the bright orange fruit of the Australians, whereas the brown fruit carried by the NZers was much better camoflagued.