$ git clone -n https://src.fedoraproject.org/rpms/rust-rustversion.git /var/lib/mock/f40-build-2652423-66894/root/chroot_tmpdir/scmroot/rust-rustversion
Cloning into '/var/lib/mock/f40-build-2652423-66894/root/chroot_tmpdir/scmroot/rust-rustversion'...
$ git fetch origin ca97fa83fb660a02b818629a7bc0a82bbbc71bee:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-rustversion
 * [new ref]         ca97fa83fb660a02b818629a7bc0a82bbbc71bee -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ca97fa8 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild