message: Add precision on overriding a repository [patch]
diff: @@ -332,6 +332,17 @@ the new `uuid` crate applies to *both* our dependency on `uuid` and the
  version for this entire crate graph, 1.0.1, and it'll be pulled from the git
  repository.
  +#### Overriding repository URL
  +
  +In case the dependency you want to override isn't loaded from `crates.io`, you'll have to change a bit how you use `[patch]`:
  +
  +```
  +[patch."https://github.com/your/repository"]
  +my-library = { path = "../my-library/path" }
  +```
  +
  +And that's it!
  +
  ### Prepublishing a breaking change
  As a final scenario, let's take a look at working with a new major version of a
  