$ git clone -n https://src.fedoraproject.org/rpms/kernel /var/lib/mock/f41-build-side-1-3148576-40058/root/chroot_tmpdir/scmroot/kernel
Cloning into '/var/lib/mock/f41-build-side-1-3148576-40058/root/chroot_tmpdir/scmroot/kernel'...
$ git fetch origin 2b843a732fb8876d53cd2e4b3b95f0a7b6aaf0ab:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kernel
 * [new ref]             2b843a732fb8876d53cd2e4b3b95f0a7b6aaf0ab -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2b843a732 kernel-6.12.7-200