$ git clone -n https://src.fedoraproject.org/rpms/kernel-headers.git /var/lib/mock/f40-build-786653-134487/root/chroot_tmpdir/scmroot/kernel-headers
Cloning into '/var/lib/mock/f40-build-786653-134487/root/chroot_tmpdir/scmroot/kernel-headers'...
$ git fetch origin bb06e44a705690aeea5f8a7e52da169b96543751:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kernel-headers
 * [new ref]         bb06e44a705690aeea5f8a7e52da169b96543751 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bb06e44 Linux v6.8-rc6