Getting the commit message when running a Jenkins pipeline job

jenkins-pipeline-get-commit-message.groovy

commit = sh(returnStdout: true, script: 'git log -1 --oneline').trim()

String commitMsg = ""

List commitMsgPre = commit.split(" ")

for(int i=1; i<commitMsgPre.size(); i++){
  commitMsg += commitMsgPre.getAt(i) + " "
}

git log -1 --oneline

(git log -1 --pretty=%B)

Many thanks for this snippet! But everything after

commit = ...

can be replaced by the one line

commitMsg = commit.substring( commit.indexOf(' ') ).trim()