Potential fix also proposed in https://github.com/jenkinsci/git-plugin/pull/395
Code changed in jenkins User: Mark Waite Path: src/test/java/hudson/plugins/git/GitSCMTest.java http://jenkins-ci.org/commit/git-plugin/b0a4057298808407801d86550b73ec5614dc5683 Log: JENKINS-26268 test checkout of remotes/origin/master with two repos defined
Fixed in git plugin 2.5.0 released 19 Jun 2016