echo branch name instead of trying to execute it

Change-Id: I65f1f4ff0e8ecd62f78120918f8bb8e817c20a46
diff --git a/jjb/pipeline/synopsys-single.groovy b/jjb/pipeline/synopsys-single.groovy
index c1df6ec..29af685 100644
--- a/jjb/pipeline/synopsys-single.groovy
+++ b/jjb/pipeline/synopsys-single.groovy
@@ -47,7 +47,7 @@
           ],
         ])
         script {
-          git_tag_or_branch = sh(script:"cd $projectName; if [[ \$(git tag -l --points-at HEAD) ]]; then git tag -l --points-at HEAD; else ${branchName}; fi", returnStdout: true).trim()
+          git_tag_or_branch = sh(script:"cd $projectName; if [[ \$(git tag -l --points-at HEAD) ]]; then git tag -l --points-at HEAD; else echo ${branchName}; fi", returnStdout: true).trim()
         }
       }
     }