Most repositories under the golang organization is using the go repo's issue tracker and has their issues disabled. Each repo that uses this issue tracker needs to give a link to https://golang.org/issues/new from its README to help the users find the correct location to file bugs.

GitHub also allows to pre-fill the title section with a query parameter. For example, we use https://golang.org/issue/new?title=x/mobile:+ from the mobile repo README. Each repo can follow the same pattern to help contributors properly prefix the title.