OSX go get报错
go get Unknown SSL protocol error in connection to gopkg.in
https://github.com/niemeyer/gopkg/issues/49
FYI, on OS X 10.12.3, go 1.8, and git 2.12.0, I was having this issue until I ran git config --global http.sslVerify true.
git config --global http.sslVerify true