If you have the names and email addresses of all svn committers, list them in a newline-separated file, each line reading
svn-id = Person's Name <email@address>-- I kind of started tracking a list of jQuery committers, but got bored and/or side-tracked before finding the last ones. Anyway, if you go through the trouble, pass along this file on the command line (
git svn clone -A committers.txt ...) when you create your local copy.
The docs for git-svn are not the best, and didn't mention how to import news into your local git repository for more than the branch you have checked out at the moment. The trick, which might be obvious for some but was not for me (thanks, singpolyma!), is to run
git svn fetch --allto update your local repository with data for all branches, instead of (well, or besides)
git svn rebasethat just updates your currently checked-out branch.
And Bob's your uncle.