$ git clone -n https://src.fedoraproject.org/rpms/chemical-mime-data.git /var/lib/mock/f40-build-2283555-55594/root/chroot_tmpdir/scmroot/chemical-mime-data
Cloning into '/var/lib/mock/f40-build-2283555-55594/root/chroot_tmpdir/scmroot/chemical-mime-data'...
$ git fetch origin 0b24530d69b2f955bc12bbc9c5c9306e08cf6e64:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/chemical-mime-data
 * [new ref]         0b24530d69b2f955bc12bbc9c5c9306e08cf6e64 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0b24530 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild