In Go 1.5 we have the beginings of vendoring support. The easiest way to incorperate other projects into your Git repo is by using the following command. Short and dirty, but it works:

$ git subtree add --prefix vendor/gopkg.in/check.v1  \
    https://gopkg.in/check.v1 master --squash

Being that I wont remember the command, its now here in the blog. Also, don’t forget to set your environment:

$ export GO15VENDOREXPERIMENT=1