How to apply SVN diff to Git?

What I actually did/looking for was:

cd /path/to/svn/repo
svn diff -r 125 > /tmp/patch.diff
cd /path/to/git/repo
patch -p0 < /tmp/patch.diff

Try:

svn diff | patch -d /path/to/git/repo -p0

See svn help diff if you want to export a specific revision's diff.