What do I do about this?
git push
Counting objects: 30, done.
Delta compression using up to 4 threads.
Compressing objects: 100% (14/14), done.
fatal: error when closing sha1 file: Input/output error
error: pack-objects died of signal 13
error: failed to push some refs to '...'
I tried the following from answers to a similar question
git repack
git prune
git gc --aggressive
Nothing helps. The remote is a mounted AFS filesystem, I have been pushing to it without incident for a couple years. I am not anywhere near quota, and I have permission (I can touch a file on this filesystem without problem). Git version 1.7.5.4.
Apparently this was, as indicated in the comment, a problem with the remote file server. After waiting a while, I was able to push without incident.