It would be nice to have JOGL’s sourcecode along with the binaries of each release here: https://jogl.dev.java.net/servlets/ProjectDocumentList
We’ll include a clean checkout of the source tree for subsequent release builds. Unfortunately putting up the generated source (GL.java, GLU.java) is a bit more problematic but if you file an RFE using the Issue tracker on the JOGL web page we’ll try to modify the build scripts to make that work.