Maven project py4j-opennlp

Started by an SCM change
Building remotely on build1 in workspace /var/jenkins/workspace/py4j-opennlp
Cloning the remote Git repository
Cloning repository git@projects.digital-humanities.de:workshop/opennlp-py4j
git --version
git version 1.8.5
ERROR: Error cloning remote repo 'origin'
hudson.plugins.git.GitException: Could not clone git@projects.digital-humanities.de:workshop/opennlp-py4j
	at org.jenkinsci.plugins.gitclient.CliGitAPIImpl$1.execute(CliGitAPIImpl.java:310)
	at org.jenkinsci.plugins.gitclient.RemoteGitImpl$CommandInvocationHandler$1.call(RemoteGitImpl.java:151)
	at org.jenkinsci.plugins.gitclient.RemoteGitImpl$CommandInvocationHandler$1.call(RemoteGitImpl.java:144)
	at hudson.remoting.UserRequest.perform(UserRequest.java:118)
	at hudson.remoting.UserRequest.perform(UserRequest.java:48)
	at hudson.remoting.Request$2.run(Request.java:328)
	at hudson.remoting.InterceptingExecutorService$1.call(InterceptingExecutorService.java:72)
	at java.util.concurrent.FutureTask.run(FutureTask.java:262)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:744)
Caused by: hudson.plugins.git.GitException: Command "clone --progress -o origin git@projects.digital-humanities.de:workshop/opennlp-py4j /var/jenkins/workspace/py4j-opennlp" returned status code 128:
stdout: 
stderr: Klone nach '/var/jenkins/workspace/py4j-opennlp'...
Permission denied, please try again.
Permission denied, please try again.
Permission denied (publickey,password).
fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.

	at org.jenkinsci.plugins.gitclient.CliGitAPIImpl.launchCommandIn(CliGitAPIImpl.java:981)
	at org.jenkinsci.plugins.gitclient.CliGitAPIImpl.launchCommandWithCredentials(CliGitAPIImpl.java:920)
	at org.jenkinsci.plugins.gitclient.CliGitAPIImpl.access$400(CliGitAPIImpl.java:64)
	at org.jenkinsci.plugins.gitclient.CliGitAPIImpl$1.execute(CliGitAPIImpl.java:308)
	... 10 more
ERROR: null
Finished: FAILURE