I have created a COPR for Xfce 4.13 packages. These packages are available for Fedora 25, 26 and rawhide. This COPR repository can be enabled using dnf as follows -
dnf copr enable nonamedotc/xfce-414
Please visit -
https://copr.fedorainfracloud.org/coprs/nonamedotc/xfce-414/
to look at what packages are available.
I have not had the chance to test the packages (not even installed on a VM). So, expect several rough edges. These are not official Fedora packages. So, please do NOT report bugs to bugzilla.
Instead, open issues, request missing packages and/or provide patches in the related pagure repo -
The pagure git has all the spec files and patches used to build the packages in COPR.
Happy testing.
Cheers, Mukundan.