goreturns:
Error: Command failed: /usr/local/bin/go get -u -v github.com/sqs/goreturns
github.com/sqs/goreturns (download)
# cd /Users/jerry/go/src/github.com/sqs/goreturns; git pull --ff-only
There is no tracking information for the current branch.
Please specify which branch you want to merge with.
See git-pull(1) for details.
git pull <remote> <branch>
If you wish to set tracking information for this branch you can do so with:
git branch --set-upstream-to=origin/<branch> master
The error message is like following: