Issue
You want to obtain the entire release history of your application
Resolution
If your app has 1000 or fewer releases you can use the heroku releases command
heroku releases -n 1000 -a <app-name>
For apps with more than 1000 releases, you can use the Platform API Release List endpoint to get the release info in batches of 1000
To get the first 1000 releases you'd run
curl -n https://api.heroku.com/apps/<app-name>/releases -H "Accept: application/vnd.heroku+json; version=3" -H "Range: version 1..; order=asc, max=1000"
For the next 1000, version 1..; will be replaced with version 1001..; in the above API call