jenkinsci/git-client-plugin — pull request #125 by Tetradeus (2014-03-25 11:19:52+00:00)
Title: Changed abstract class CheckoutCommand to an interface

Looks required in order to be proxyfied in git-plugin

org.jenkinsci.plugins.gitclient.CheckoutCommand is not an interface
at java.lang.reflect.Proxy.getProxyClass0(Proxy.java:496)
at java.lang.reflect.Proxy.newProxyInstance(Proxy.java:722)
at org.jenkinsci.plugins.gitclient.RemoteGitImpl.command(RemoteGitImpl.java:112)
at org.jenkinsci.plugins.gitclient.RemoteGitImpl.checkout(RemoteGitImpl.java:278)
at hudson.plugins.git.GitSCM.checkout(GitSCM.java:889)