$ git clone -n https://github.com/xcp-ng-rpms/amd-microcode.git /var/lib/mock/v8.3-incoming-8845-27781/root/chroot_tmpdir/scmroot/amd-microcode
Cloning into '/var/lib/mock/v8.3-incoming-8845-27781/root/chroot_tmpdir/scmroot/amd-microcode'...
$ git fetch origin 9ad03b38ff24373fa99187914c917aaa47eab289:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/amd-microcode
 * [new ref]         9ad03b38ff24373fa99187914c917aaa47eab289 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9ad03b3 Update microcode to 20250626-1