$ git clone -n https://src.fedoraproject.org/rpms/zenon.git /var/lib/mock/f42-build-865996-173646/root/chroot_tmpdir/scmroot/zenon
Cloning into '/var/lib/mock/f42-build-865996-173646/root/chroot_tmpdir/scmroot/zenon'...
$ git fetch origin 6033d8718cd3817ba26a79b6827d4b7a4bb29875:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/zenon
 * [new ref]         6033d8718cd3817ba26a79b6827d4b7a4bb29875 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6033d87 OCaml 5.3.0 rebuild for Fedora 42