I don't think the issue was with specifying the version in the package address. It is that you need to use a 3rd party, remote service, to redirect your reques

I don't think the issue was with specifying the version in the package address. It is that you need to use a 3rd party, remote service, to redirect your requests to the appropriate git repo and branch. This is because Go doesn't support specifying branches/tags itself when specifying a git dependency. This workaround is contingent on gopkg.in people keeping their service maintained and running. If they went down, all your dependencies would break.