$ git clone -n https://src.fedoraproject.org/rpms/FlightGear.git /var/lib/mock/f41-build-2044748-25295/root/chroot_tmpdir/scmroot/FlightGear
Cloning into '/var/lib/mock/f41-build-2044748-25295/root/chroot_tmpdir/scmroot/FlightGear'...
$ git fetch origin 35e10e4122397f1e92181c88cd1389fe50607fe6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/FlightGear
 * [new ref]         35e10e4122397f1e92181c88cd1389fe50607fe6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 35e10e4 convert GPLv2+ license to SPDX