$ git clone -n https://src.fedoraproject.org/rpms/rust-num-rational.git /var/lib/mock/f40-build-2653359-66900/root/chroot_tmpdir/scmroot/rust-num-rational
Cloning into '/var/lib/mock/f40-build-2653359-66900/root/chroot_tmpdir/scmroot/rust-num-rational'...
$ git fetch origin ca391201ac30e052f192c4ddecf540844dd2f4de:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-num-rational
 * [new ref]         ca391201ac30e052f192c4ddecf540844dd2f4de -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ca39120 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild