Following up to myself:
In case you are using git-svn please change into the directory of your git-svn clone, open the file .git/config and find the section named [svn-remote "svn"] in there. In the "url=" line of that section please change the "incubator/ooo" part of the URL to "openoffice".
If you are running into problems with this simple approach please use the extended instructions for the "General Case" at
https://git.wiki.kernel.org/index.php/GitSvnSwitch Thanks for the feedback, Oliver-Rainer! Herbert