Jenkins gerrit builds

Hello, I did not want to make the tree dirty so I am not sure what the cause. Refer to [1]. You notice build failure for patchset 4, while patchset 4 is good. The error belongs to patchset 2. It seems that after rebase from gerrit the jenkins fails to fetch the correct sources? Or it builds different patchset and report the error always at last? This happens in several changes. Thanks, Alon [1] http://gerrit.ovirt.org/#/c/7301/