Checked the spec file with rpmlint:

$ rpmlint gimp-saver-plugin.spec 
0 packages and 1 specfiles checked; 0 errors, 0 warnings.

Did a scratch build in koji:
http://koji.fedoraproject.org/koji/taskinfo?taskID=8098475

$ koji build --scratch f20 ./gimp-saver-plugin-0.0-1.20141111git8754ae6.fc20.src.rpm

[snip]

  0 free  0 open  4 done  0 failed

I'm seeking a sponsor.

F21 scratch build:

http://koji.fedoraproject.org/koji/taskinfo?taskID=8127427

$ koji build --scratch f21 ./gimp-saver-plugin-0.0-1.20141111git8754ae6.fc20.src.rpm

[snip]

  0 free  0 open  4 done  0 failed


Rawhide scratch build:

http://koji.fedoraproject.org/koji/taskinfo?taskID=8127530

$ koji build --scratch f22 ./gimp-saver-plugin-0.0-1.20141111git8754ae6.fc20.src.rpm

[snip]

  0 free  0 open  4 done  0 failed


The plugin with these steps and works for me:

1) install the plugin
2) start the GIMP
3) select Edit -> Keyboard Shortcuts
4) unfold the Plug-Ins section
5) scroll down to "Saver   Disabled   python-fu-saver"
6) click on Disabled and assign shortcut (like Ctrl+S)
7) scroll down to "Saver as...   Disabled   python-fu-saver-as"
8) click on Disabled and assign shortcut (like Shift+Ctrl+S)
9) de-select "Save keyboard shotcuts on exit" if you don't want
   these shortcuts saved permanently
10) click Close
11) File -> New -> Ok
12) add something to the canvas
13) press Ctrl+S or Shift+Ctrl+S

This is an automatic check from review-stats script.

This review request ticket hasn't been updated for some time. We're sorry
it is taking so long. If you're still interested in packaging this software
into Fedora repositories, please respond to this comment clearing the
NEEDINFO flag.

You may want to update the specfile and the src.rpm to the latest version
available and to propose a review swap on Fedora devel mailing list to increase
chances to have your package reviewed. If this is your first package and you
need a sponsor, you may want to post some informal reviews. Read more at
https://fedoraproject.org/wiki/How_to_get_sponsored_into_the_packager_group.

Without any reply, this request will shortly be considered abandoned
and will be closed.
Thank you for your patience.

This is an automatic action taken by review-stats script.

The ticket submitter failed to clear the NEEDINFO flag in a month.
As per https://fedoraproject.org/wiki/Policy_for_stalled_package_reviews
we consider this ticket as DEADREVIEW and proceed to close it.

So it took 6 years for any response to this review request and even then it's just a bot which also auto-closes it... I changed the status to WONTFIX as it better reflects the experience.