Might be hard to do, since it has been around for a while, but here's the Github issue on the project about the name: https://github.com/gocd/gocd/issues/131
The answer to this question probably deserves a blog post. But, as mentioned by @willejs here (https://news.ycombinator.com/item?id=7646496), Jenkins has a well established community of plugins and plugin writers and so, is quite extensible. Go has good visualisation and good modeling capability, allowing you to model complex build and deployment workflows using a combination of tasks running in parallel and serial.
Both have many more pros and cons. To do justice to it, it needs a blog post. Let's see. Maybe I'll write one soon.
