List all branches jenkins groovy script

GITHUB_PROJECT = “https://github.com/zagadishreddy/game-of-life.git”
GITHUB_CREDENTIALS_ID = “Telcel” //maps to a Jenkins Credentials Vault ID
APPLICATION_NAME = “Telcel”
GITHUB_BRANCH = ‘${env.BRANCH_NAME}’
node{
// Stages
stage (“Listing Branches”) {
echo “Initializing workflow”
//checkout code
echo GITHUB_PROJECT
git url: GITHUB_PROJECT, credentialsId: GITHUB_CREDENTIALS_ID
sh ‘git branch -r | awk \'{print $1}\’ ORS=\’\\n\’ >branches.txt’
sh ”’cut -d ‘/’ -f 2 branches.txt > branch.txt”’
//sh “sed s’/origin”\’///g branches.txt > branch.tx”
//sed ‘s/$/from S0 to S1/’
}
stage(‘get build branch Parameter User Input’) {

liste = readFile ‘branch.txt’
echo “please click on the link here to chose the branch to build”
env.BRANCH_SCOPE = input message: ‘Please choose the branch to build ‘, ok: ‘Validate!’,
parameters: [choice(name: ‘BRANCH_NAME’, choices: “${liste}”, description: ‘Branch to build?’)]
}
stage(‘Checkout external proj’) {
echo “${env.BRANCH_SCOPE}”
git branch: “${env.BRANCH_SCOPE}”,
credentialsId: ‘Telcel’,
url: ‘https://github.com/zagadishreddy/game-of-life.git’

sh “ls -lat”
}
}