Just do it like this: https://naosense.github.io/github-gazer/?q=user/repo, e.g. for repository naosense/markdown-preview-sync, visit https://naosense.github.io/github-gazer/?q=naosense/markdown-preview-sync, below is the snapshot:
you can specify a token in url like this: https://naosense.github.io/github-gazer/?q=user/repo&token=your-own-token
Let the world witness the history of your repository!