Maybe that's just poor documentation on the author's part. If you simply try and go get the package (running Go 1.5 here):

    ~ $ go get -u github.com/otoolep/syslog-gollector
  warning: code.google.com is shutting down; import path code.google.com/p/log4go will stop working
  warning: code.google.com is shutting down; import path code.google.com/p/snappy-go/snappy will stop working
    ~ $

Everything is fine (aside from the warnings about code.google shutting down).

Yes, Go does not have a culture of versioning, but it _does_ have a culture of _vendoring_. You should be getting your reproducible builds by vendoring your dependencies. That way, you don't need to do any hunting or git-bisect shenanigans.