$ git clone -n https://src.fedoraproject.org/rpms/kernel-headers.git /var/lib/mock/f40-build-802038-143949/root/chroot_tmpdir/scmroot/kernel-headers
Cloning into '/var/lib/mock/f40-build-802038-143949/root/chroot_tmpdir/scmroot/kernel-headers'...
$ git fetch origin 491e7b280b26688e2f606e6df5e05c5499189110:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kernel-headers
 * [new ref]         491e7b280b26688e2f606e6df5e05c5499189110 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 491e7b2 Linux v6.8.3