$ git clone -n https://src.fedoraproject.org/rpms/kf6-kauth.git /var/lib/mock/f42-build-side-1-3585971-46912/root/chroot_tmpdir/scmroot/kf6-kauth
Cloning into '/var/lib/mock/f42-build-side-1-3585971-46912/root/chroot_tmpdir/scmroot/kf6-kauth'...
$ git fetch origin 3b50fc37fdeefac3d252d9dfcfda4ce6c07e64d5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf6-kauth
 * [new ref]         3b50fc37fdeefac3d252d9dfcfda4ce6c07e64d5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3b50fc3 6.16.0