Jenkins Integration with Git Server

    Here is my configuration of Jenkins integration with Git Server - in my case Atlassian Bitbucket Server 4.1.3 x64.

• Install Jenkins ButBucket Plugin in Jenkins
• Install Bitbucket Server Webhook to Jenkins in Bitbucket via Web GUI, then set parameters of this Repo
• Go to specific Repo, then go to Settings, then Hooks
• Enable "Bitbucket Server Webhook to Jenkins"
• Set Jenkins URL, Repo Clone URL
• Go to Jenkins
• Create a Task
• Set Git Source Code Management
• Git Repository URL, 
• Credentials, 
• Branches (I added two branches - develop, master in my case)
• Additional Behaviors
• Additional Behaviors: Check out to a sub-directory: C:\Build\AcRepo
• Build Triggers:
• Check option: "Build when a change is pushed to BitBucket"
• Check option: "Poll SCM": Schedule: H/2 * * * *
• The schedule follow the syntax of cron. The minimal time I can set is 2 minutes.
• No once you push code the Repo, Jenkins will pull down the branch you push to, and build the project immediately.

Even though I checked the Poll SCM, with schedule for 2 minutes, the repo will build immediately. If I remote do not check this options, I can not get Jenkins Build.