This is actually for the Workspace Cleanup Plugin (not listed in Components).

Request the ability to preserve the .git repository clone within a workspace when cleanWs() or an analogue is run within a pipeline. The need to run cleanWs came from our sysadmin because of heavy inode usage in multiple builds instead of disk free space needs. It takes over 2 hours to perform a clone from scratch, so we would like something that keeps the .git directory around. An exclusion pattern might be useful, like cleanButNot(['.git',...]).