$ git clone -n https://src.fedoraproject.org/rpms/rust-platforms.git /var/lib/mock/f40-build-2642833-66473/root/chroot_tmpdir/scmroot/rust-platforms
Cloning into '/var/lib/mock/f40-build-2642833-66473/root/chroot_tmpdir/scmroot/rust-platforms'...
$ git fetch origin 3809628885c055401ed4091fd94ff5161d809ef3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-platforms
 * [new ref]         3809628885c055401ed4091fd94ff5161d809ef3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3809628 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild