(This process assumes you've configured an OAUTH application secret, Jenkins for GitHub webhook access, and GitHub access to Jenkins)

Run the following steps:

-Create 2 GitHub repositories: buildtest1 and foo1 (initialized with README)
-Configure their WebHook with http://your-jenkins-url:8080/github-webhook/, your secret text, etc.
-Select Just the push event for the WebHook configuration
-Add Jenkins user to Collaborators & Teams and give your Jenkins user Admin access to the buildtest1 and foo1 repositories
-Create branches in both, respectively: 1.1, 5.0
-Create Freestyle job with Git and Multiple SCM Plugin, selecting GitHub hook trigger for GITScm polling:
+Add SCM for both buildtest1 and foo1, with */master as the branch.
+