Description of problem:

In my copr project, https://copr.fedorainfracloud.org/coprs/waby38/4kopen
I've enabled both fedora-33-armhfp & fedora-34-armhfp

After sending a build generation from (example)
copr-cli build waby38/4kopen ply-2.1.1-2.fc34.src.rpm

=> 2 x build success 
https://copr.fedorainfracloud.org/coprs/waby38/4kopen/build/2153615/

fedora-33-armhfp  is ok, 
fedora-34-armhfp is broken
https://download.copr.fedorainfracloud.org/results/waby38/4kopen/fedora-34-armhfp/02153615-ply/
=> .rpm are build for fc35 armhfp
  => builder-live.log.gz show that they are using FC35 rpm for building
     https://download.copr.fedorainfracloud.org/results/waby38/4kopen/fedora-34-armhfp/02153615-ply/builder-live.log.gz

Version-Release number of selected component (if applicable):


How reproducible:


Steps to Reproduce:
1. enable both fedora-33-armhfp & fedora-34-armhfp in settings=> project details => builds options
2. use "copr-cli build .src.rpm" to build your .rpm
3. check result in fedora-34-armhfp directory

Actual results:

content of fedora-34-armhfp is a FC35 armhfp build

Expected results:

fedora-34-armhfp should build for FC34 armhfp

Additional info: