Specify the branches if you'd like to track a specific branch in a repository. If left blank, all branches will be examined for changes and built. The syntax is of the form: REPOSITORYNAME/BRANCH. In addition, BRANCH is recognized as a shorthand of */BRANCH, '*' is recognized as a wildcard, and '**' is recognized as wildcard that includes the separator '/'. Therefore, origin/branches* would match origin/branches-foo but not origin/branches/foo, while origin/branches** would match both origin/branches-foo and origin/branches/foo.