Using Git as back end, when renaming a job the commit added all files under /job/renamedJob/* to the commit, rather that just the ones supposed to be included by default.

the commit message looks like:

Job [oldJobName] hierarchy renamed from [jobs/oldJobName] to [jobs/newJobName] by user

The commit added 114 new files:

jobs/newJobName/builds/date/triggerlog.xml
jobs/newJobName/builds/date/build.xml
jobs/newJobName/builds/date/changelog.xml
jobs/newJobName/builds/date/injectedEnvVars.txt

repeating for each retaining build.

The documentation says it should only be including the following by default:
config.xml
hudson*.xml
scm-sync-configuration.xml
jobs/*/config.xml

but it incorrectly add jobs/newJobName/builds/*.[txt|xml]