$ git clone -n https://src.fedoraproject.org/rpms/kf6-sonnet.git /var/lib/mock/f40-build-2387204-60496/root/chroot_tmpdir/scmroot/kf6-sonnet
Cloning into '/var/lib/mock/f40-build-2387204-60496/root/chroot_tmpdir/scmroot/kf6-sonnet'...
$ git fetch origin 418b83cb9af00f1aa4d2ba6565b5b34045af3011:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf6-sonnet
 * [new ref]         418b83cb9af00f1aa4d2ba6565b5b34045af3011 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 418b83c 5.249.0