$ git clone -n https://src.fedoraproject.org/rpms/ocaml-astring.git /var/lib/mock/f39-build-1502318-34912/root/chroot_tmpdir/scmroot/ocaml-astring
Cloning into '/var/lib/mock/f39-build-1502318-34912/root/chroot_tmpdir/scmroot/ocaml-astring'...
$ git fetch origin a289dc2ca4ece49c8a33c89e4ea61c3512152d87:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-astring
 * [new ref]         a289dc2ca4ece49c8a33c89e4ea61c3512152d87 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a289dc2 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild