$ git clone -n https://src.fedoraproject.org/rpms/klettres.git /var/lib/mock/f40-build-2194420-51498/root/chroot_tmpdir/scmroot/klettres
Cloning into '/var/lib/mock/f40-build-2194420-51498/root/chroot_tmpdir/scmroot/klettres'...
$ git fetch origin f3d30e814a5561d5d07adf74d722a7e221907bd7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/klettres
 * [new ref]         f3d30e814a5561d5d07adf74d722a7e221907bd7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f3d30e8 24.01.85