He's saying the community solved it, and the Go Team is using the best ideas from the community to start implementing a solution built into the Go tools. This

He's saying the community solved it, and the Go Team is using the best ideas from the community to start implementing a solution built into the Go tools. This has been their policy from the start. The Go team knows that Google tends to handle dependency management differently from your standard project, so they left it to the community to help build and decide which tools and ideas work best for dependency management. Several have arisen, and the Go team has started implementing some of those ideas.