Elastic File System (EFS) is Amazon's scalable filesystem product that is exposed to the OS as an NFS mount. We're using EFS to host the filesystem used by a Jenkins CI server. Sometimes when Jenkins tries to git fetch, we get this error: $ git -c core.askpass=true fetch --tags --progress git@xxxxxxxxxx:mediasilo/dodo.git +refs/pull/*:refs/remotes/origin/pr/* fatal: Reference directory conflict: refs/heads/ $ echo $? 128 Has anyone seen anything like this before? Any tips on how to troubleshoot it? Related Jenkins issue: https://issues.jenkins-ci.org/browse/JENKINS-37653 -- To unsubscribe from this list: send the line "unsubscribe git" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html