$ git clone -n https://src.fedoraproject.org/rpms/simfqt.git /var/lib/mock/f42-build-3408498-45145/root/chroot_tmpdir/scmroot/simfqt
Cloning into '/var/lib/mock/f42-build-3408498-45145/root/chroot_tmpdir/scmroot/simfqt'...
$ git fetch origin 9fb04e488c2e552bf8d4408d228fdac58b33d167:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/simfqt
 * [new ref]         9fb04e488c2e552bf8d4408d228fdac58b33d167 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9fb04e4 Upstream update