Setup your OS X environment based on your "location" by checking the WiFi network you're connected to.

init-env-wifi.sh

#!/bin/sh

# the name of your Wireless interface. Might be en1 on some machines.
AIRPORT="en0" 

# name of the wifi network
WIFI_WORK="<name-of-your-office-wifi>";

if networksetup -getairportnetwork $AIRPORT | grep -i -a $WIFI_WORK ;
then
  # commit using my office credentials
  export GIT_AUTHOR_NAME="<Your Name>"
  export GIT_AUTHOR_EMAIL="<Your Email>"
  export GIT_COMMITTER_NAME="$GIT_AUTHOR_NAME"
  export GIT_COMMITTER_EMAIL="$GIT_AUTHOR_EMAIL"
fi