Heroku CLI v2.30.0 released with new git:remote and maintenance commands.
Change effective on 25 July 2012
A new version of the Heroku CLI is available with new git:remote and maintenance commands.
heroku git:remote makes it easier to add the git remote for an app to an existing git repository and you can find more information by running heroku help git:remote or reviewing Creating a Heroku remote.
heroku maintenance will now return the current maintenance value for an application, which will be either ‘on’ or 'off’. You can find more information by running heroku help maintenance or reviewing Maintenance Mode.
See the CLI changelog for details and update by using heroku update.