$ git clone -n https://src.fedoraproject.org/rpms/zenon.git /var/lib/mock/f39-build-2469871-61444/root/chroot_tmpdir/scmroot/zenon
Cloning into '/var/lib/mock/f39-build-2469871-61444/root/chroot_tmpdir/scmroot/zenon'...
$ git fetch origin a46d61aa456966eac006ec5b74aba387d655a13c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/zenon
 * [new ref]         a46d61aa456966eac006ec5b74aba387d655a13c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a46d61a Rebuild for coq 8.18.0