$ git clone -n https://src.fedoraproject.org/rpms/kernel.git /var/lib/mock/f42-build-side-1-3588244-46943/root/chroot_tmpdir/scmroot/kernel
Cloning into '/var/lib/mock/f42-build-side-1-3588244-46943/root/chroot_tmpdir/scmroot/kernel'...
$ git fetch origin a201f0d068af65b778533bd7215173609dbf538a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kernel
 * [new ref]             a201f0d068af65b778533bd7215173609dbf538a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a201f0d06 kernel-6.15.6-200