Fix tekton pipelines.

.webhook_bridge/pipeline-format.yaml

@@ -7,7 +7,6 @@ spec:
     pipeline: "2h0m0s"
     tasks: "1h0m0s"
     finally: "0h30m0s"
-  serviceAccountName: build-bot
   taskRunTemplate:
     serviceAccountName: build-bot
   pipelineSpec:
@@ -58,7 +57,7 @@ spec:
               value: https://code.fizz.buzz/mirror/git-clone.git # mirror of https://github.com/tektoncd-catalog/git-clone.git
             # - name: revision
             #   value: c3498c69cf6de9583e1c667e723fd8626af1b33c
-            - name: ref
+            - name: tag
               value: "v1.7.0"
             - name: pathInRepo
               value: task/git-clone/git-clone.yaml