$ git clone -n https://src.fedoraproject.org/rpms/fennel.git /var/lib/mock/f42-build-side-1-3498243-45962/root/chroot_tmpdir/scmroot/fennel
Cloning into '/var/lib/mock/f42-build-side-1-3498243-45962/root/chroot_tmpdir/scmroot/fennel'...
$ git fetch origin dd0158882295d681b4a3f471c9280face8355eee:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/fennel
 * [new ref]         dd0158882295d681b4a3f471c9280face8355eee -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dd01588 Remove upstreamed patch