Add backward compatible Geo API support for new SystemHook event

app/services/geo/schedule_repo_fetch_service.rb

@@ -2,7 +2,7 @@ module Geo
   class ScheduleRepoFetchService
     def initialize(params)
       @project_id = params[:project_id]
-      @remote_url = params[:remote_url]
+      @remote_url = params[:project][:git_ssh_url]
     end
 
     def execute

lib/api/geo.rb

@@ -66,7 +66,7 @@ module API
           required_attributes! %w(key id)
           ::Geo::ScheduleKeyChangeService.new(params).execute
         when 'repository_update'
-          required_attributes! %w(event_name project_id remote_url)
+          required_attributes! %w(event_name project_id project)
           ::Geo::ScheduleRepoFetchService.new(params).execute
         when 'push'
           required_attributes! %w(event_name project_id project)