Hello CLT23!
This is a hop between the go tool requesting the latest version of golangleipzig.space/clt23 and the repository hosting the actual code (234).
$ go install golangleipzig.space/clt23@latest
$ clt23
If you want to bypass the default module proxy (e.g. to circumvent caching in the proxy), you can use:
$ GOPRIVATE="*" go install golangleipzig.space/clt23@latest
If you take a look a the source of this page, you’ll discover the go-import meta tag. The go install flow is visualized below.