They've started to think about it: https://groups.google.com/forum/#!topic/golang-dev/nMWoEAG55...

I don't believe so. Your options are still pretty much:

(a) vendoring with something like godep[1], or (b) point in time scm fetching with something like gpm[2].

[1]: https://github.com/tools/godep

[2]: https://github.com/pote/gpm