$ git clone -n https://src.fedoraproject.org/rpms/kernel.git /var/lib/mock/f43-build-side-110360-58911280-6569219/root/chroot_tmpdir/scmroot/kernel
Cloning into '/var/lib/mock/f43-build-side-110360-58911280-6569219/root/chroot_tmpdir/scmroot/kernel'...
$ git fetch origin aceb1fabb4d572891f4bddb2f0163f8c871da993:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kernel
 * [new ref]             aceb1fabb4d572891f4bddb2f0163f8c871da993 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at aceb1fabb kernel-6.15.0-0.rc2.20250418gitfc96b232f8e7.25