$ git clone -n https://src.fedoraproject.org/rpms/python-werkzeug.git /var/lib/mock/f40-build-2114308-50675/root/chroot_tmpdir/scmroot/python-werkzeug
Cloning into '/var/lib/mock/f40-build-2114308-50675/root/chroot_tmpdir/scmroot/python-werkzeug'...
$ git fetch origin b6c6546b027ea89c217157dae4ed953d809974c6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-werkzeug
 * [new ref]         b6c6546b027ea89c217157dae4ed953d809974c6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b6c6546 Conditionalize test run to smoothen Python rebuild