Considering the docs:

GIT_LOCAL_BRANCH - Name of the branch on Jenkins. When the "checkout to specific local branch" behavior is configured, the variable is published.  If the behavior is configured as null or **, the property will contain the resulting local branch name sans the remote name.

I have set the checkout to specific local branch to ** using an SCM managed Jenkinsfile (not multibranch). In the Jenkinsfile I try to access the GIT_LOCAL_BRANCH variable but it is set to null. Same goes for the other env variables mentioned in the [docs|https://wiki.jenkins.io/display/JENKINS/Git+Plugin.]

On printing all the env variables using:

echo bat(script: 'env|sort', returnStdout: true)

none of the a fore mentioned env variable are available.

If I try to access the env variable in a normal job, it is set correctly.