$ git clone -n https://github.com/xcp-ng-rpms/linux-firmware.git /var/lib/mock/v8.2-incoming-8855-27782/root/chroot_tmpdir/scmroot/linux-firmware
Cloning into '/var/lib/mock/v8.2-incoming-8855-27782/root/chroot_tmpdir/scmroot/linux-firmware'...
$ git fetch origin 5742cb804d9cecb330a1f3cd2c1ba78ace1674d7:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/linux-firmware
 * [new ref]         5742cb804d9cecb330a1f3cd2c1ba78ace1674d7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5742cb8 Merge pull request #10 from xcp-ng-rpms/gdy-8.2-XSA-471