$ git clone -n https://src.fedoraproject.org/rpms/chibi-scheme.git /var/lib/mock/f40-build-2283558-55594/root/chroot_tmpdir/scmroot/chibi-scheme
Cloning into '/var/lib/mock/f40-build-2283558-55594/root/chroot_tmpdir/scmroot/chibi-scheme'...
$ git fetch origin 65b8611b88877ffc9800f7f0d420f30b8804e13e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/chibi-scheme
 * [new ref]         65b8611b88877ffc9800f7f0d420f30b8804e13e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 65b8611 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild