Problem with git-svn with limited SVN access

Hello,

I have a problem with a git-svn setup and although I spent most of yesterday googling for a solution but did not find any (see below for my failed attempts). I hope you guys here will be able to help me.

I have limited access to a SVN repository with a "standard" layout. By limited, I mean that I am allowed only to access the folders "trunk", "branches/XXX" and "branches/YYY".

*Attempt 1:*
 > git svn init svn://server/aaa/AAA -T trunk -b branches --username=UUU
Initialized empty Git repository in /home/.../.git/
Using higher level of URL: svn://server/aaa/AAA => svn://server/aaa
 > git svn fetch
Error from SVN, (220001): Item is not readable: Item is not readable

*Attempt 2:*
 > git svn init svn://server/aaa/AAA -T trunk -b branches --username=UUU 
--no-minimize-url
Initialized empty Git repository in /home/.../.git/
 > git svn fetch
W: Item is not readable: Item is not readable at 
/usr/libexec/git-core/git-svn line 1782

Error from SVN, (220001): Item is not readable: Item is not readable

*Attempt 3:*
 > git svn init svn://server/aaa/AAA -T trunk --username=UUU 
--no-minimize-url
Initialized empty Git repository in /home/.../.git/
 > git svn fetch
W: Item is not readable: Item is not readable at 
/usr/libexec/git-core/git-svn line 1782

W: Ignoring error from SVN, path probably does not exist: (160013): 
Filesystem has no item: File not found: revision 100, path '/AAA/trunk'
W: Do not be alarmed at the above message git-svn is just searching 
aggressively for old history.
This may take a while on large repositories
Read access denied for root of edit: Not authorized to open root of edit 
operation at /usr/libexec/git-core/git-svn line 5131

*Attempt 4:*
 > git svn init -T svn://server/aaa/AAA/trunk -b 
svn://server/aaa/AAA/branches --username=UUU --no-minimize-url

Initialized empty Git repository in /home/.../.git/
svn-remote.svn.url already set: svn://server/aaa/AAA/trunk
wanted to set to: svn://server/aaa/AAA/branches
 > git svn fetch
W: Ignoring error from SVN, path probably does not exist: (160013): 
Filesystem has no item: File not found: revision 100, path '/AAA/trunk'
W: Do not be alarmed at the above message git-svn is just searching 
aggressively for old history.
This may take a while on large repositories
          ### stuff actually retrieved from SVN
          .....
r6035 = 6163cb28acff14d68f1b96869274b668405897a2 (refs/remotes/trunk)
          .....
Compressing objects: 100% (10751/10751), done.
Writing objects: 100% (10886/10886), done.
Total 10886 (delta 9331), reused 0 (delta 0)
Checking out files: 100% (6002/6002), done.
Checked out HEAD:
   svn://server/aaa/AAA/trunk r27316
creating empty directory: lib/AAA/mp3gain/otherlang/help
...
### No line with any branch. So it looks like I managed to get the trunk 
but not the branches.

*Attempt 5:*
 > git svn init -T svn://server/aaa/AAA/trunk -b 
svn://server/aaa/AAA/branches --username=UUU --no-minimize-url

Initialized empty Git repository in /home/.../.git/
svn-remote.svn.url already set: svn://server/aaa/AAA/trunk
wanted to set to: svn://server/aaa/AAA/branches
### My .git/config looks like:
[svn-remote "svn"]
         url = svn://server/aaa/AAA/trunk
         fetch = :refs/remotes/trunk
### If I try to add one of the branches manually:
branches = branches/XXX:refs/remotes/branches/XXX
 > git svn fetch
One '*' is needed in glob: 'branches/XXX'

*Attempt 6:*
 > git svn init -T svn://server/aaa/AAA/trunk -b 
svn://server/aaa/AAA/branches --username=UUU --no-minimize-url

Initialized empty Git repository in /home/.../.git/
svn-remote.svn.url already set: svn://server/aaa/AAA/trunk
wanted to set to: svn://server/aaa/AAA/branches
### I put a glob instead of the branch name in git/.config:
branches = branches/{XXX,YYY}:refs/remotes/branches/*
 > git svn fetch
...
Counting objects: 10886, done.
Delta compression using up to 8 threads.
Compressing objects: 100% (10751/10751), done.
Writing objects: 100% (10886/10886), done.
Total 10886 (delta 9330), reused 0 (delta 0)
error: Untracked working tree file 'COPYRIGHT.txt' would be overwritten 
by merge.
read-tree -m -u -v HEAD HEAD: command returned error: 128
### Only refs/remotes/trunk checked out. No branch.

At this point, I'm really lost and running out of ideas. If someone could help me with this, I would be very grateful.

Please forgive me if I posted to the wrong mailing-list but I could not find a specific git-svn list. If there is such thing, please point me in the right direction.

Thanks,

Antoine.