[INFO] Working directory: /var/lib/jenkins/scm-sync-configuration/checkoutConfiguration
[INFO] Executing: /bin/sh -c cd /var/lib/jenkins/scm-sync-configuration/checkoutConfiguration && git checkout
[INFO] Working directory: /var/lib/jenkins/scm-sync-configuration/checkoutConfiguration
[INFO] Executing: /bin/sh -c cd /var/lib/jenkins/scm-sync-configuration/checkoutConfiguration && git ls-files
[INFO] Working directory: /var/lib/jenkins/scm-sync-configuration/checkoutConfiguration
May 01, 2017 4:13:48 PM hudson.plugins.scm_sync_configuration.ScmSyncConfigurationBusiness initializeRepository
INFO: SCM repository initialization done.
May 01, 2017 4:13:48 PM hudson.WebAppMain$3 run
INFO: Jenkins is fully up and running
[INFO] Executing: /bin/sh -c cd /var/lib/jenkins/scm-sync-configuration/checkoutConfiguration && git rev-parse --show-toplevel
[INFO] Working directory: /var/lib/jenkins/scm-sync-configuration/checkoutConfiguration
[INFO] Executing: /bin/sh -c cd /var/lib/jenkins/scm-sync-configuration/checkoutConfiguration && git status --porcelain .
[INFO] Working directory: /var/lib/jenkins/scm-sync-configuration/checkoutConfiguration
May 01, 2017 4:15:59 PM hudson.plugins.scm_sync_configuration.SCMManipulator checkinFiles
SEVERE: [checkinFiles] Error while checkin : Exception while executing SCM command.
May 01, 2017 4:15:59 PM hudson.plugins.scm_sync_configuration.ScmSyncConfigurationBusiness processCommitsQueue
SEVERE: Error while processing commit queue : Error while checking in file to scm repository

How can I look at some more traces to discover the problem?