Fedora 27 brings Golang 1.9, which includes performance improvements, bug fixes, and new features. Most notably, support for type aliasing, parallel compilation, and direct bit manipulation has been added. For a complete list of changes, see upstream change notes at https://tip.golang.org/doc/go1.9.
With this release, support for the ppc64 architecture has been left out from the Fedora Golang packages due to the fact that the ppc64 port of 'GC' is not feature-complete.