He was born because the old beard model no longer fit the newer face models, causing it to look like Lincoln's beard. Once we realised there was a ginger variation of the beard available, a red suit and top hat quickly followed. That's how things go in QA. Ginger Lincoln made regular appearances in daily test movies, accompanied by cries of, "It's Ginger Lincoln!". It was merely a matter of time before he made his cinematic debut.
A startling insight into the mind and mentality of your average QA tester.
A higher-resolution version is available here.