How to set up a Git hook so that after pushing to ssh://peter@foo.com/~/bar.com.git, it will go to ~/bar.com and do a git pull?

You can add a post-receive hook to the ~/bar.com.git repo for this. To do this add to the ~/bar.com.git/hooks/ directory an executable file post-receive with the content:

#!/bin/sh

unset $(git rev-parse --local-env-vars)
cd ~/bar.com
git pull

Make sure the post-receive file has the executable bits(e.g. 755).

Now whenever something is pushed to the ~/bar.com.git repo, the ~/bar.com repo is updated automatically.

See also

• getting “fatal: not a git repository: ‘.'” when using post-update hook to execute ‘git pull’ on another repo
• Git – post-receive hook with git pull “Failed to find a valid git directory”

to understand why unsetting some environment variables is necessary.