I've been seeing similar messages in all the recently updated patches on gerrit, regardless of which project they belong to:

08:16:47 Fetching upstream changes from git://gerrit.ovirt.org/ovirt-engine.git
08:16:47  > git --version # timeout=10
08:16:47  > git -c core.askpass=true fetch --tags --progress git://gerrit.ovirt.org/ovirt-engine.git refs/changes/74/69074/1 --prune
08:16:47 ERROR: Error fetching remote repo 'origin'
08:16:47 hudson.plugins.git.GitException: Failed to fetch from git://gerrit.ovirt.org/ovirt-engine.git
08:16:47 	at hudson.plugins.git.GitSCM.fetchFrom(GitSCM.java:766)
08:16:47 	at hudson.plugins.git.GitSCM.retrieveChanges(GitSCM.java:1022)
08:16:47 	at hudson.plugins.git.GitSCM.checkout(GitSCM.java:1053)
08:16:47 	at org.jenkinsci.plugins.multiplescms.MultiSCM.checkout(MultiSCM.java:129)
08:16:47 	at hudson.scm.SCM.checkout(SCM.java:485)
08:16:47 	at hudson.model.AbstractProject.checkout(AbstractProject.java:1269)
08:16:47 	at hudson.model.AbstractBuild$AbstractBuildExecution.defaultCheckout(AbstractBuild.java:607)
08:16:47 	at jenkins.scm.SCMCheckoutStrategy.checkout(SCMCheckoutStrategy.java:86)
08:16:47 	at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:529)
08:16:47 	at hudson.model.Run.execute(Run.java:1738)
08:16:47 	at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:43)
08:16:47 	at hudson.model.ResourceController.execute(ResourceController.java:98)
08:16:47 	at hudson.model.Executor.run(Executor.java:410)
08:16:47 Caused by: hudson.plugins.git.GitException: Command "git -c core.askpass=true fetch --tags --progress git://gerrit.ovirt.org/ovirt-engine.git refs/changes/74/69074/1 --prune" returned status code 128:
08:16:47 stdout: 
08:16:47 stderr: fatal: unable to connect to gerrit.ovirt.org:
08:16:47 gerrit.ovirt.org[0: 107.22.212.69]: errno=Connection refused

Can someone take a look please?

Thanks!