Previously, the Bitbucket Server integration plugin set the GIT_BRANCH environment variable equal to the local branch name checked out by Jenkins. In versions of the plugin < 3.6.0 a multibranch pipeline's job named example/example-branch would have a GIT_BRANCH variable set to example-branch. After upgrading to 4.0.0 of the plugins, that same variable would be origin/example-branch. This is breaking a lot of our Jenkinsfiles that depend on the previous behavior.

Example code

 stage("Print GIT_BRANCH"){
     steps{
       echo env.GIT_BRANCH
   }
 } 

Output on 3.6.0

aidaleuc/smoketests

Output on 4.0.0

origin/aidaleuc/smoketests