$ git clone -n https://src.fedoraproject.org/rpms/goobook.git /var/lib/mock/f39-build-1462035-33296/root/chroot_tmpdir/scmroot/goobook
Cloning into '/var/lib/mock/f39-build-1462035-33296/root/chroot_tmpdir/scmroot/goobook'...
$ git fetch origin e9955fa33e592415e3a46c3c6c74a87d91b8af56:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/goobook
 * [new ref]         e9955fa33e592415e3a46c3c6c74a87d91b8af56 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e9955fa Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild