Add branch for python-glad2

msvsphere-9.json

@@ -2613,7 +2613,8 @@
       "url": "https://src.fedoraproject.org/rpms/python-gevent.git"
     },
     "python-glad2": {
-      "url": "https://src.fedoraproject.org/rpms/python-glad2.git"
+      "url": "https://src.fedoraproject.org/rpms/python-glad2.git",
+      "branch": "f39"
     },
     "python-hatch-vcs": {
       "url": "https://src.fedoraproject.org/rpms/python-hatch-vcs.git"