get and filter git branch in jenkins pipeline

gistfile1.txt

    stage("git remote"){
        withCredentials([usernamePassword(credentialsId: 'git_worker', passwordVariable: 'PASS', usernameVariable: 'USERNAME')]) {
            String filterBranch = "release/"
            String sh_git_result = sh(script: "git ls-remote http://${USERNAME}:${PASS}@bitbucket.yourdomain.com/scm/rpl/client.git | grep ${filterBranch}", returnStdout: true).trim()
		    println sh_git_result
		    
		    //regex to take only `release/01.02` from `refs/heads/release/01.02-fake-239` - (?<=heads\/).*(?<=\d{2}\.\d{2}) 
		    // to take only `release/*` -> (?<=heads\/).*
		    
		    branch_result = (sh_git_result =~ /(?<=heads\/).*/)[0]
            println branch_result
        }
    }