git - What should remotes/origin/HEAD set to?

Question

If the developers are working on develop branch, for a new project

1) Clone

git clone <git_url> should be able to automatically clone develop branch locally without using -b option, so that

$ git branch -a # after clone should give
* develop
  remotes/origin/HEAD -> origin/develop
  remotes/origin/develop

2) Push

When developer pushes local branch(develop) changes to remote repository(origin/develop) using command git push origin develop, my understanding is, changes are pushed to origin/master, if remotes/origin/HEAD points to origin/master, unlike mentioned in this comment

---

Question:

1) Is it recommended to run git remote set-head origin develop and set HEAD pointer in remote repository, before performing above two tasks? by any developer

2) Does git push origin develop pushes changes origin/develop irrespective of remotes/origin/HEAD value in remote repository?

3) We use webhook between GitLab & Jenkins. Does env.gitlabSourceBranch provided by GitLab plugin, gives branch name that remotes/origin/HEAD point to? If yes, how to get the branch name on which, push event happen? through webhook.

Below are the settings done in GitLab, to retrieve branch name on which new commit occured:

Below is the code in Jenkins:

node('worker_node'){

    stage('stage1'){

        def repoName = env.gitlabSourceRepoName
        println "Repository Name: " + repoName // gives correct repo name


        def branchName = env.gitlabSourceBranch
        println "Branch name: " + branchName // gives always 'master' as value
   }
}

Answer 1

Waitting for answers