Can I push to more than one repository in a single command in git?

You can have several URLs per remote in git, even though the git remote command did not appear to expose this last I checked. In .git/config, put something like this:

[remote "public"]
    url = git@github.com:kch/inheritable_templates.git
    url = kch@homeserver:projects/inheritable_templates.git

Now you can say “git push public” to push to both repos at once.