I wanted to see where, when and how I could make use of GIT_BRANCH in a job that tracks multiple branches. Branch specifier is set to 'origin/topic/*', which matches two branches - 'parallel_1' and 'parallel_2'. In the additional behaviors section, I specified '${GIT_BRANCH}' as local subdirectory for repo.

I start the job manually and it triggers two builds - one for each matching branch. However, my workspace contains two directories called '${GIT_BRANCH}' (from build #1 for parallel_1 branch) and 'parallel_1' (from build #2 for parallel_2 branch).

I would expect GIT_BRANCH to be used consistently - either correctly all the time or never.