Just find the git://git.eclipse.org/gitroot/virgo/org.eclipse.virgo.sample-formtags.git. However, after checking out, I get the following error by following the instructions in the README.TXT file under the war folder. It complains that a file named default.xml does not exist in the vrigo-build/war folder.
/home/rice/workshops/osgi/org.eclipse.virgo.sample-formtags/war/formtags-war/build.xml:8: Cannot find /home/rice/workshops/osgi/org.eclipse.virgo.sample-formtags/war/formtags-war/../../virgo-build/war/default.xml imported from /home/rice/workshops/osgi/org.eclipse.virgo.sample-formtags/war/formtags-war/build.xml.
The formtags sample may have rotted a bit. Did you try building it with Ant? The git repository is meant to be built with Ant to produce a zip which the user grabs and builds with Maven. See here.