I just did a quick build of it in my scratchbox install, and I got the stock GTK desktop version running beautifully. However, the person who owns that git repo makes a reference to building against Hildon, which I haven't been able to figure out, probably due to the fact that I don't understand autoconf, nor do I particularly want to. :P I might fire him/her an e-mail and ask about the status, especially given anidel's work on Xournal for Maemo. If someone else is working on a different build, then that bears some looking into.
Do note that the code as-is will build a successful package, but will not add dependencies to the package control file. This means you will have to install libpoppler-glib4 (in -devel, so the usual caveats apply - don't do it unless you know what you're doing, and unless you know how to fix your phone if things go terribly, horribly wrong with it, which they probably will.), and libgnomecanvas2-0 manually.
Cheers,