$ git clone -n https://github.com/xcp-ng-rpms/xen.git /var/lib/mock/v8.3-incoming-10226-28802/root/chroot_tmpdir/scmroot/xen
Cloning into '/var/lib/mock/v8.3-incoming-10226-28802/root/chroot_tmpdir/scmroot/xen'...
$ git fetch origin b8bae07f6b87aab50b0d3db579bc821c0af74796:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/xen
 * [new ref]         b8bae07f6b87aab50b0d3db579bc821c0af74796 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b8bae07 fixup! XSA-477 CVE-2025-58150, XSA-479 CVE-2026-23553