This example: http://doc.trolltech.com/qtmobility-1.1-tp/fetchgooglemaps.html is not present in the following "qt-mobility-opensource-src-1.2.0" directory:
[17:05:10 Tue May 17] ~/tarBalls/qt-mobility-opensource-src-1.2.0/examples $ls
annotatedurl bttennis documentproperties ndefeditor sfwecho
audiodevices calendardemo examples.pro notesmanagerplugin sfw-notes
audioinput camera filemanagerplugin publish-subscribe slideshow
audiooutput connectivity flickrdemo qmlorganizer sysinfo
audiorecorder declarative-camera hapticsplayer qsystemalignedtimer todo
battery-charge declarative-connectivity hapticsquare querymessages videographicsitem
bearercloud declarative-location keepintouch quickstart videowidget
bearermonitor declarative-messages landmarkbrowser radio writemessage
bluetoothtransferplugin declarative-music-browser logfilepositionsource samplephonebook
btchat declarative-sfw-dialer mapsdemo sensors
btfiletransfer declarative-sfw-notes mediabrowser servicebrowser
btscanner declarative-systeminfo mobility_examples.pri serviceinstaller_sfw_symbian
[17:08:20 Tue May 17] ~/tarBalls/qt-mobility-opensource-src-1.2.0/examples $
The FetchGoogleMaps example seems to have been removed from the Qt Mobility examples after version 1.0.0. You could try getting it from one of these older tags, although there is no guarantee that it will work with the recent sources and might have some bugs.
Edit:
As the OP has found out, there are currently two improved examples over the older FetchGoogleMaps which can be found here and here.