$ git clone -n https://src.fedoraproject.org/rpms/zenon.git /var/lib/mock/f40-build-2260515-54410/root/chroot_tmpdir/scmroot/zenon
Cloning into '/var/lib/mock/f40-build-2260515-54410/root/chroot_tmpdir/scmroot/zenon'...
$ git fetch origin 05c59effb88c24b80b732fae1b31b2ae5ee59a8d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/zenon
 * [new ref]         05c59effb88c24b80b732fae1b31b2ae5ee59a8d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 05c59ef Rebuild for coq 8.18.0