Hi all,

I'm having the below issue.

I was change my code to use GIT Reference repository in Jenkinsfile code such as below.

But so I send made a new pull request in GIT-HUB for the purpose of merge these changes into my master branch.

But when the Pull-Request running I saw in my builder machine (workspace) its not downloading (fetching) the relevant Remote Pull-Request Head/Branch/ because in my workspace (builder-machine) local branch always checkout with the master branch and fetching from the master branch and not checkout for the correct Pull Request Head. 

eg: Above screenshot is the way that my local workspace's .git > HEAD file looks like in the Pull Request I created after above code changes. And as you can see in the HEAD file it's automatically checkout in to the master branch instead of checking out into the relevant Pull-Request hash (tag). 

• But below is the correct screenshot I captured from any of other Pull Requests, which should be the correct way to show the checkout branch or the HEAD.

I hope you will understand my situation here? Please let me know if you guys need further information.

I throughly suggest that I want some code to replace above Yellow color highlighted sections. 
So please could anyone please give some advice regarding this issue ?