The Egit zip file was obtained from:

http://www.eclipse.org/egit/download/
http://download.eclipse.org/egit/updates-2.2/org.eclipse.egit.repository-2.2.0.201212191850-r.zip
http://www.eclipse.org/downloads/download.php?file=/egit/updates/org.eclipse.egit.repository-3.1.0.201310021548-r.zip

This zip file includes the source jars.