$ git clone -n https://src.fedoraproject.org/rpms/rust-random.git /var/lib/mock/f40-build-2643064-66480/root/chroot_tmpdir/scmroot/rust-random
Cloning into '/var/lib/mock/f40-build-2643064-66480/root/chroot_tmpdir/scmroot/rust-random'...
$ git fetch origin 64b4b5f0974bcf07eee3755e5e3de0240e85051e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-random
 * [new ref]         64b4b5f0974bcf07eee3755e5e3de0240e85051e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 64b4b5f Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild