copystructure
copystructure is a Go library for deep copying values in Go.
This allows you to copy Go values that may contain reference values
such as maps, slices, or pointers, and copy their data as well instead
of just their references.
Installation
Standard go get:
$ go get github.com/mitchellh/copystructure
Usage & Example
For usage and examples see the Godoc.
The Copy function has examples associated with it there.