Configurable branch for saltenv update

Change-Id: I98115ac61fc60d29fe5fc0e421285b819879d20f
diff --git a/jenkins/client/job/deploy/update/saltenv.yml b/jenkins/client/job/deploy/update/saltenv.yml
index 397e3f3..1ce1494 100644
--- a/jenkins/client/job/deploy/update/saltenv.yml
+++ b/jenkins/client/job/deploy/update/saltenv.yml
@@ -5,6 +5,7 @@
   _param:
     jenkins_salt_api_url: "http://${_param:salt_master_host}:6969"
     jenkins_salt_model_name: "salt"
+    jenkins_salt_model_branch: "master"
   jenkins:
     client:
       job_template:
@@ -21,6 +22,7 @@
             scm:
               type: git
               url: "${_param:jenkins_gerrit_url}/salt-models/{{name}}"
+              branch: ${_param:jenkins_salt_model_branch}
               credentials: "gerrit"
               script: Jenkinsfile
             param: