Refactored all pipelines branches to external soft param

Change-Id: I3e451815029227f287aa1575099b0cd25b72433d
diff --git a/jenkins/client/job/kill_stuck_jobs.yml b/jenkins/client/job/kill_stuck_jobs.yml
index 57f0b3f..cc69c6b 100644
--- a/jenkins/client/job/kill_stuck_jobs.yml
+++ b/jenkins/client/job/kill_stuck_jobs.yml
@@ -14,6 +14,7 @@
           scm:
             type: git
             url: "${_param:jenkins_gerrit_url}/mk/mk-pipelines"
+            branch: "${_param:jenkins_pipelines_branch}"
             credentials: "gerrit"
             script: abort-long-running-jobs.groovy
           trigger: