Fix 'GitLockFailedException' on tweedledee

20:42:37 java.io.IOException: Could not checkout e9704497ea4c220670c9a777315a3cfb6e4d1e97
20:42:37 	at hudson.plugins.git.GitSCM.checkout(GitSCM.java:910)
20:42:37 	at hudson.model.AbstractProject.checkout(AbstractProject.java:1253)
20:42:37 	at hudson.model.AbstractBuild$AbstractBuildExecution.defaultCheckout(AbstractBuild.java:622)
20:42:37 	at jenkins.scm.SCMCheckoutStrategy.checkout(SCMCheckoutStrategy.java:86)
20:42:37 	at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:528)
20:42:37 	at hudson.model.Run.execute(Run.java:1740)
20:42:37 	at hudson.matrix.MatrixRun.run(MatrixRun.java:146)
20:42:37 	at hudson.model.ResourceController.execute(ResourceController.java:89)
20:42:37 	at hudson.model.Executor.run(Executor.java:240)
20:42:37 Caused by: hudson.plugins.git.GitLockFailedException: Could not lock repository. Please try again
20:42:37 	at org.jenkinsci.plugins.gitclient.CliGitAPIImpl$8.execute(CliGitAPIImpl.java:1589)
20:42:37 	at org.jenkinsci.plugins.gitclient.RemoteGitImpl$CommandInvocationHandler$1.call(RemoteGitImpl.java:153)
20:42:37 	at org.jenkinsci.plugins.gitclient.RemoteGitImpl$CommandInvocationHandler$1.call(RemoteGitImpl.java:146)
20:42:37 	at hudson.remoting.UserRequest.perform(UserRequest.java:118)
20:42:37 	at hudson.remoting.UserRequest.perform(UserRequest.java:48)
20:42:37 	at hudson.remoting.Request$2.run(Request.java:328)
20:42:37 	at hudson.remoting.InterceptingExecutorService$1.call(InterceptingExecutorService.java:72)
20:42:37 	at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
20:42:37 	at java.util.concurrent.FutureTask.run(Unknown Source)
20:42:37 	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
20:42:37 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
20:42:37 	at hudson.remoting.Engine$1$1.run(Engine.java:63)
20:42:37 	at java.lang.Thread.run(Unknown Source)