Ny way to call only one rule within a SaltStack state

You can set a grain on the minion that indicates if the MySQL-State has run before. Just add this to your State:

mysql_master_status:
  mystate.query:
    - query: SHOW MASTER STATUS
  grains.present:
    - name: mysql
    - value: master

Then you can wrap things in your State you only want to run once between an if Statement:

{% if salt['grains.get']('mysql') != 'master' %}
...
{% endif %}

The advantage of this method is that you can now also keep track of your Minions who are MySQL-Masters. The downside is that you have to keep an eye on your grains so that the information won't get lost.

You could create a custom runner that would execute your svn commands and then run your highstate as needed.

There are a lot of good example here: https://github.com/saltstack/salt/tree/develop/salt/runners