Try something

Author: wtgodbe

.azure/pipelines/ci-unofficial.yml

@@ -97,6 +97,11 @@ extends:
         enabled: true
       tsa:
         enabled: true
+    templateContext:
+      inputs:
+      - input: checkout
+        repository: self
+        submodules: true
     containers:
       azureLinux30Net10BuildAmd64:
         image: mcr.microsoft.com/dotnet-buildtools/prereqs:azurelinux-3.0-net10.0-build-amd64