Commit Reference SHA-1 API is now official

We're making the Commit Reference SHA-1 API part of the official GitHub API.

During the preview period you needed to provide the application/vnd.github.chitauri-preview+sha preview media type in the Accept header to opt-in to the changes. Now that the preview period has ended the custom media type has changed to application/vnd.github.v3.sha (but the preview type will continue to work).

If you have any questions or feedback, please get in touch with us!