Branch to be checked out in the workspace. Default is 'master'.

Note that this must be a local branch name like 'master' or 'develop'. Remote branch names like 'origin/master' and 'origin/develop' are not supported as the branch argument. Tag names are not supported as the branch argument. SHA-1 hashes are not supported as the branch argument. Remote branch names, tag names, and SHA-1 hashes are supported by the general purpose checkout step.