$ git clone -n https://src.fedoraproject.org/rpms/gr-air-modes.git /var/lib/mock/f41-build-852420-166343/root/chroot_tmpdir/scmroot/gr-air-modes
Cloning into '/var/lib/mock/f41-build-852420-166343/root/chroot_tmpdir/scmroot/gr-air-modes'...
$ git fetch origin a8912071ca3b5829c2ecffbcab6523547516cbaa:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gr-air-modes
 * [new ref]         a8912071ca3b5829c2ecffbcab6523547516cbaa -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a891207 Rebuilt for new gnuradio