How to receive local Git branch name with Jenkins Git plugin?

Question

I am using Branch Specifier option of Jenkins Git plugin (v2.0) to run build on specific branch, e.g. 1.4.

${GIT_BRANCH} in this case conta

Answer 1

Based on this SO answer: How to do I get the output of a shell command executed using into a variable from Jenkinsfile (groovy)?

I used this, and finally was able to get it to work (the below example assumes a branch variable of $Branch):

stage('Checkout') {
    GIT_BRANCH_LOCAL = sh (
        script: "echo $Branch | sed -e 's|origin/||g'",
        returnStdout: true
    ).trim()
    echo "Git branch: ${GIT_BRANCH_LOCAL}"
    git branch: "${GIT_BRANCH_LOCAL}", credentialsId: '...', url: 'git@github.com:......git'
}