$ git clone -n https://src.fedoraproject.org/rpms/rust-parking_lot.git /var/lib/mock/f39-build-1489482-34501/root/chroot_tmpdir/scmroot/rust-parking_lot
Cloning into '/var/lib/mock/f39-build-1489482-34501/root/chroot_tmpdir/scmroot/rust-parking_lot'...
$ git fetch origin 352d83530cc4be1433061ef0171b9a12588d9d4d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-parking_lot
 * [new ref]         352d83530cc4be1433061ef0171b9a12588d9d4d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 352d835 Regenerate with rust2rpm v24