From Fedora Project Wiki

Getting at files from koji's lookaside

$ cat /etc/rpkg/fedpkg.conf
[fedpkg]
lookaside = http://pkgs.fedoraproject.org/repo/pkgs
lookasidehash = md5
lookaside_cgi = https://pkgs.fedoraproject.org/repo/pkgs/upload.cgi
gitbaseurl = ssh://%(user)s@pkgs.fedoraproject.org/%(module)s
anongiturl = git://pkgs.fedoraproject.org/%(module)s
tracbaseurl = https://%(user)s:%(password)s@fedorahosted.org/rel-eng/login/xmlrpc
branchre = f\d$|f\d\d$|el\d$|olpc\d$|master$
kojiconfig = /etc/koji.conf
build_client = koji

From /usr/lib/python2.7/site-packages/pyrpkg/__init__.py's sources() method:

           self.log.info("Downloading %s" % (file))
           url = '%s/%s/%s/%s/%s' % (self.lookaside, self.module_name,
                                     file.replace(' ', '%20'),
                                     csum, file.replace(' ', '%20'))

So e.g. the line from "sources":

    676dc96593362b7b0aa54fea0c8e744c  pygobject-3.3.4.tar.xz

Giving e.g. this link: http://pkgs.fedoraproject.org/repo/pkgs/pygobject3/pygobject-3.3.4.tar.xz/676dc96593362b7b0aa54fea0c8e744c/pygobject-3.3.4.tar.xz