The only tool I can think of is svnsync:
svnsync is the Subversion remote repository mirroring tool. Put
simply, it allows you to replay the revisions of one repository into
another one.
In any mirroring scenario, there are two repositories: the source
repository, and the mirror (or “sink”) repository. The source
repository is the repository from which svnsync pulls revisions. The
mirror repository is the destination for the revisions pulled from the
source repository. Each of the repositories may be local or
remote—they are only ever addressed by their URLs.
The svnsync process requires only read access to the source
repository; it never attempts to modify it. But obviously, svnsync
requires both read and write access to the mirror repository.