Jenkins issues

Hey, so - I have an issue this job: is often picking a wrong commit! http://jenkins.ovirt.org/user/fabiand/my-views/view/ovirt-node-ng/job/ovi... It says it resetted to master, but master is actually a different commit. I observed this a few times in the recent days. Does somebody have an idea why this could be happening? 00:00:02.156 Checking out Revision c1970c6f7a6404e8ab030147eec81233905345cf (origin/master) on my local host: $ git rev-parse FETCH_HEAD^{commit} # timeout=10 9123c1fd3ce15b02f2e69efdc367ae1477193aef c1970c6f7a6404e8ab030147eec81233905345cf -- does actually no exist (in my history) - fabian