$ git clone -n https://src.fedoraproject.org/rpms/nanovna-saver.git /var/lib/mock/f40-build-1926218-25107/root/chroot_tmpdir/scmroot/nanovna-saver
Cloning into '/var/lib/mock/f40-build-1926218-25107/root/chroot_tmpdir/scmroot/nanovna-saver'...
$ git fetch origin 669abda5719680412530009c0e58cdbdd667e9fc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/nanovna-saver
 * [new ref]         669abda5719680412530009c0e58cdbdd667e9fc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 669abda New version