Merge "Add example GERRIT_REFSPEC to Jenkins UI docs"

diff --combined jjb/releng-macros.yaml
index 8814727c36d6d557c6e22cdf514cc6369286a93f,03741018018f005c1aa93239080ea18a78b473c1..82e772c74fac727c3ca240c9db0f2e676bf9701d
--- 1/jjb/releng-macros.yaml
--- 2/jjb/releng-macros.yaml
+++ b/jjb/releng-macros.yaml
@@@ -41,7 -41,10 +41,10 @@@
        - string:
            name: GERRIT_REFSPEC
            default: '{refspec}'
-           description: "GERRIT_REFSPEC parameter if not given by trigger"
+           description: |
+               Gerrit reference to checkout (ex: refs/heads/master,
+               refs/changes/48/61548/1 where 61548 is Gerrit change ID, 1 is
+               patch number and 48 is last two digits of change ID)
        - string:
            name: STACK_NAME
            default: '$SILO-$JOB_NAME-$BUILD_NUMBER'
@@@ -641,7 -644,6 +644,7 @@@
                clean install dependency:tree
                -DoutputFile=dependency_tree.txt -s fake_remotes.xml
                -Pq
 +              -Dsft.heap.max=4g
                -DskipTests=false
                {mvn-opts}
            java-opts: