Fix git repo URL

Change-Id: I5de2c75ad998704a0b0b4349137e3edd733b6271
diff --git a/jjb/onos/onos-buck-gerrit.yaml b/jjb/onos/onos-buck-gerrit.yaml
index 5438527..b58294f 100644
--- a/jjb/onos/onos-buck-gerrit.yaml
+++ b/jjb/onos/onos-buck-gerrit.yaml
@@ -5,6 +5,7 @@
     name: onos-buck-gerrit
     project-type: pipeline
     sandbox: false
+    git-url: '$GIT_URL/$GERRIT_PROJECT'
 
     pipeline-scm:
       script-path: tools/build/jenkins/onos-buck-gerrit