joplin/packages/default-plugins/pluginRepositories.json

{
	"io.github.jackgruber.backup": {
		"cloneUrl": "https://github.com/JackGruber/joplin-plugin-backup.git",
		"branch": "master",
		"commit": "5ba57c18ac0f24f20832f012e015a080b138f0c4"
	}
}