Best approach to test flathub PR in Builder

What are best practices to test locally a flathub PR

Example: Update libgit2, enchant, gspell and git modules by flathubbot · Pull Request #77 · flathub/org.gnome.gitg · GitHub

Of course I can use artifacts build by CI:

flatpak install --user https://dl.flathub.org/build-repo/131059/org.gnome.gitg.flatpakref

but to finally merge and do changes I prefer to use sources.

Still my trick is to add a fake last module to flathub sources, so GNOME Builder stops on it

index 01d5023..c5a8bdf 100644
--- i/org.gnome.gitg.json
+++ w/org.gnome.gitg.json
@@ -236,6 +236,9 @@
                     ]
                 }
             ]
+        },
+        {
+            "name": "gitg-fake"
         }
     ]
 }

and run from GNOME Builder. Can we add an option for GNOME Builder to not stop on last module?