Particles are small, modular blocks with preset scripting that enable you to add elements to your Grav Gantry 5 pages.
Upload edit_page_with_git.html.twig and edit_page_with_git.yaml files to your /user/themes/THEME_DIR/custom/particles directory. For example, to install in the default Grav Gantry 5 theme Hydrogen copy the two particle files to /user/themes/g5_hydrogen/custom/particles. If the custom folder does not exist create it.
The perfect companion to this Gantry 5 particle is the Grav GitSync Plugin.
Once the particle is installed, Grav pages will support the following Header/FrontMatter option:
gitRepoEditURL: https://github.com/hibbitts-design/grav-skeleton-course-hub/tree/master/pages/01.home # to override the automatically calculated Git Repository URL