$ git clone -n https://src.fedoraproject.org/rpms/krop.git /var/lib/mock/f41-build-side-2-python-2708258-30471/root/chroot_tmpdir/scmroot/krop
Cloning into '/var/lib/mock/f41-build-side-2-python-2708258-30471/root/chroot_tmpdir/scmroot/krop'...
$ git fetch origin 3e1105f8e3831e6490f0a44404463fdca28f32a8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/krop
 * [new ref]         3e1105f8e3831e6490f0a44404463fdca28f32a8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3e1105f convert GPLv3+ license to SPDX