You can also download the Project zip, with every file (including the LFS files), from the release section: https://github.com/Unity-Technologies/SmallOfficeRayTracing/releases.
# Unity version
This Project uses the real-time ray tracing feature released in preview in Unity. You can not use this Project for any production work. For more information about ray tracing in HDRP, see the [Documentation](https://docs.unity3d.com/Packages/com.unity.render-pipelines.high-definition@latest/index.html?subfolder=/manual/Ray-Tracing-Getting-Started.html).
GitHub