problem git push to glib-networking

[Andika Triwidada <andika gmail com>]

Tried to push to glib-networking and got this error:

$ git push --verbose
Pushing to ssh://git.gnome.org/git/glib-networking
Counting objects: 7, done.
Delta compression using up to 2 threads.
Compressing objects: 100% (4/4), done.
Writing objects: 100% (4/4), 641 bytes, done.
Total 4 (delta 3), reused 0 (delta 0)
error: insufficient permission for adding an object to repository
database ./objects

fatal: failed to write object
error: unpack failed: unpack-objects abnormal exit
To ssh://git.gnome.org/git/glib-networking
 ! [remote rejected] master -> master (n/a (unpacker error))
error: failed to push some refs to 'ssh://git.gnome.org/git/glib-networking'

Can somebody tell me what's wrong?
Why insufficient permission?

TIA
--
andika