Edit and save in ~/Library/LaunchAgents

net.johnmacfarlane.gitit.plist

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
	<key>WorkingDirectory</key>
	<string>/Users/kowey/kowey-wiki</string>
	<key>KeepAlive</key>
	<true/>
	<key>EnvironmentVariables</key>
	<dict>
		<key>PATH</key>
		<string>/usr/bin:/bin:/usr/sbin:/sbin:/Users/kowey/.cabal/bin</string>
	</dict>
	<key>ProgramArguments</key>
	<array>
		<string>gitit</string>
		<string>-f</string>
		<string>static/config</string>
	</array>
	<key>Label</key>
	<string>net.johnmacfarlane.gitit</string>
</dict>
</plist>

Great!