How can i customize lazy.nvim itself?

[laxtiz]

I use a github mirror site update plugins, and I have set lazy's option git.url_format.
But lazy.nvim update itself still used github.com.
So how to customize lazy.nvim use git.url_format and other options like tag.

example:

return {
  "folke/lazy.nvim",
  tag = "*",
}