$ git clone -n https://src.fedoraproject.org/rpms/python-falcon.git /var/lib/mock/f40-build-735519-106446/root/chroot_tmpdir/scmroot/python-falcon
Cloning into '/var/lib/mock/f40-build-735519-106446/root/chroot_tmpdir/scmroot/python-falcon'...
$ git fetch origin 105f61852cc07d661c176b5190d01cfa7abf73f0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-falcon
 * [new ref]         105f61852cc07d661c176b5190d01cfa7abf73f0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 105f618 Update to new upstream snapshot, resolves rhbz#2226188 rhbz#2220217