Try curl instead.

Author: tecarter94

deploy/tasks/buildah-oci-ta.yaml

@@ -398,7 +398,7 @@ spec:
             echo ${DOMAIN_PROXY_ARGS[@]} # TODO remove
             /app/domain-proxy-server-runner &
             server_pid=$!
-            ping ${CACHE_URL}
+            curl -I ${CACHE_URL}
           fi
         fi
 

pkg/reconciler/dependencybuild/buildrecipeyaml.go

@@ -563,7 +563,7 @@ func createPipelineSpec(log logr.Logger, tool string, commitTime int64, jbsConfi
 					Name: "CACHE_URL",
 					Value: tektonpipeline.ParamValue{
 						Type:      tektonpipeline.ParamTypeString,
-						StringVal: whitelistUrl.Host,
+						StringVal: cacheUrl,
 					},
 				},
 			},