$ git clone -n https://github.com/xcp-ng-rpms/linux-firmware.git /var/lib/mock/v8.2-incoming-8847-27782/root/chroot_tmpdir/scmroot/linux-firmware
Cloning into '/var/lib/mock/v8.2-incoming-8847-27782/root/chroot_tmpdir/scmroot/linux-firmware'...
$ git fetch origin bb1501c9e5bde0c5dfe620c42db7960dbdbe9e0d:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/linux-firmware
 * [new ref]         bb1501c9e5bde0c5dfe620c42db7960dbdbe9e0d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bb1501c Update amd microcode to 20250626 drop