Recover broken git repository?

Hi, 
I have problems with my git repository, attached below are the steps I tried
to resolve it. But now I am stuck. Is there any good way to recover?

Thank you
Florian

-- 
Florian Breitwieser
PhD Student

Research Center of Molecular Medicine
of the Austrian Academy of Science

-------------------

$ git commit -m "Some message"
error: invalid object 1086b1c606a04bcb78b92d1d411a299d20d18034
fatal: Error building trees

$ git-fsck --full
dangling tree c2549a3cdd83098a523cb707f217f4656cde7eb5

$ git prune
$ git commit -m "Some message"
Created commit e32d5dd: Some message
 2 files changed, 167 insertions(+), 10 deletions(-)

$ git push
Counting objects: 15, done.
Compressing objects: 100% (6/6), done.
Writing objects: 100% (8/8), 2.44 KiB, done.
Total 8 (delta 4), reused 0 (delta 0)
Unpacking objects: 100% (8/8), done.
fatal: unresolved deltas left after unpacking
error: unpack failed: unpacker exited with error code
To /mnt/extstore2/bioinformatic/git/ppi.git
 ! [remote rejected] master -> master (n/a (unpacker error))
error: failed to push some refs to
'/mnt/extstore2/bioinformatic/git/ppi.git'

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