Check out repository with encoded characters

How would you check out a repository created with the command
$ svnadmin create "æ ø å"
via HTTP(S)?

I've tried the following:
$ svn co "https://example.org/svn/%c3%a6 ø å"
svn: PROPFIND request failed on '/svn/%C3%A6%20%C3%B8%20%C3%A5'
svn: Could not open the requested SVN filesystem

This works fine for other repositories:
$ svnadmin create "a b c"
$ svn co "https://example.org/svn/a b c"
Checked out revision 0.

My shell uses UTF-8 encoding:
$ set | grep LANG
GDM_LANG=en_US.UTF-8
LANG=en_US.UTF-8

-- 
Victor Engmark