> To declare the code location, an import path of the form
> repository.vcs/path
> specifies the given repository, with or without the .vcs suffix,
using the named version control system, and then the path inside
that repository.
> (...)
> If the import path is not a known code hosting site and also lacks a
version control qualifier, the go tool attempts to fetch the import
over https/http and looks for a <meta> tag in the document's HTML
<head>.