リポジトリの名称変更

mv /path/to/repos/example_repo /path/to/repos/new_example_repo

svn switch --relocate svn://www.example.orz/path/to/repos/example_repo/trunk svn://www.example.orz/path/to/repos/new_example_repos/trunk

Tracの設定変更

mv example_project new_example_project

name = new_example_project

repository_dir = /path/to/repos/new_example_repository

$ trac-admin /path/to/trac/new_example_project resync