[iainmerrick]

Yes, if your module URL is on a site you control, you can serve a <meta name="go-import" ...> tag to redirect it to your source repo. The module URL is permanent but you can move the repo.

The go-import tag is documented here: https://go.dev/ref/mod#vcs-find

It's a bit more fiddly if your module is part of a monorepo and doesn't live at the root. In that case your go-import tag needs to point to a GOPROXY server. I have a proxy server here: https://github.com/more-please/more-stuff/tree/main/gosub