GitHub has implemented a new security measure to enhance user confidence when committing code to public repositories, by automatically emailing users if they accidentally push an OAuth Access Token with a git push command. This precautionary step includes the revocation of the token to prevent unauthorized actions, thereby safeguarding user accounts and maintaining the security of sensitive information. For additional security practices, users are encouraged to consult resources like "Keeping your SSH keys and application access tokens safe" available in GitHub Help, as highlighted by Neil Matatall.