Hello,
GopherPit is a tool that allows you to have remote import paths for Go packages with custom domains.
New v0.4 release adds a new feature to specify a custom branch or tag for Git repositories. It allows to have different package paths for different package versions in the same repository that break backward compatibility with master or other branches. There is no imposed convention how a package path relates to branch or tag name, it is configurable for each package path separately.
You can check it out by download a tarball or pulling a docker image.
Janos