$ git clone -n https://src.fedoraproject.org/rpms/rust-platforms.git /var/lib/mock/f40-build-2038681-48200/root/chroot_tmpdir/scmroot/rust-platforms
Cloning into '/var/lib/mock/f40-build-2038681-48200/root/chroot_tmpdir/scmroot/rust-platforms'...
$ git fetch origin 13f91a14d08462960917e39a6ee747581ad829dd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-platforms
 * [new ref]         13f91a14d08462960917e39a6ee747581ad829dd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 13f91a1 Update to version 3.2.0; Fixes RHBZ#2247524