Fedora 25 (rawhide) disallows dnf upgrades due to certificate problems

[George R Goffe]

Hi,

I have been getting these messages about certificates for several weeks and have filed bug
reports. Red Hat is unwilling or unable to give me a definitive resolution to the problem.
Seemingly, my Fedora 25 (rawhide) system has started refusing to accept upgrades.

Any/all hints, tips, suggestions would be greatly appreciated.

Thanks,

George...

Downloading Packages:
[SKIPPED] qrmumps-2.0-6.fc26.x86_64.rpm: Already downloaded                               
                                                 
[SKIPPED] texlive-pdftex-doc-svn41149-32.fc26.1.noarch.rpm: Already downloaded            
                                                 
[SKIPPED] openblas-srpm-macros-1-1.fc27.noarch.rpm: Already downloaded                    
                                                 
(4/1751): python3-gpg-1.8.0-12.fc26.x86_64.rpm                                            
                  252 kB/s | 178 kB     00:00    
(5/1751): plplot-data-5.11.1-13.fc26.noarch.rpm                                           
                  475 kB/s | 946 kB     00:01    

(6/1751): python3-ipython-5.3.0-4.fc27.noarch.rpm                                         
                  547 kB/s | 844 kB     00:01  


  
[MIRROR] python3-appdirs-1.4.0-10.fc26.noarch.rpm: Curl error (60): Peer certificate
cannot be authenticated with given CA certificates for
https://mirror.chpc.utah.edu/pub/fedora/linux/development/rawhide/Everyth...
[Peer's certificate issuer has been marked as not trusted by the user.]

[FAILED] python3-appdirs-1.4.0-10.fc26.noarch.rpm: No more mirrors to try - All mirrors
were already tried without success                  
(8-9/1751): boost-fiber-1.63.0-5.fc27.x86_64.rpm     0% [                                 
                ] 776 kB/s | 3.6 MB     91:33 ETA
Cleaning up.