$ git clone -n https://src.fedoraproject.org/rpms/ocaml-jst-config.git /var/lib/mock/f42-build-3408473-45145/root/chroot_tmpdir/scmroot/ocaml-jst-config
Cloning into '/var/lib/mock/f42-build-3408473-45145/root/chroot_tmpdir/scmroot/ocaml-jst-config'...
$ git fetch origin 6b9694ceebe5714b907cc51782659e4c83fbb6d7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-jst-config
 * [new ref]         6b9694ceebe5714b907cc51782659e4c83fbb6d7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6b9694c Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild