Git fetch specific revision from remote repository

I think that you can do this more easily by setting up the steps in hudson to run your tests and then push, if your tests return a non-zero exit on failure. This works because I think hudson will stop executing the chain of build steps as soon as there's a failure (non-zero exit status).

The hook may be running without PATH set to something sane. Have you tried using the full path to ssh? Otherwise, take a look at the environment variables when your script runs. You can use 'export' to dump a list of them, they probably won't be what you think.