$ git clone -n https://src.fedoraproject.org/rpms/rust-tower-service.git /var/lib/mock/f40-build-2101981-50529/root/chroot_tmpdir/scmroot/rust-tower-service
Cloning into '/var/lib/mock/f40-build-2101981-50529/root/chroot_tmpdir/scmroot/rust-tower-service'...
$ git fetch origin e0e0ee6182716cf9451e0a3344bed5eca11a0a52:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-tower-service
 * [new ref]         e0e0ee6182716cf9451e0a3344bed5eca11a0a52 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e0e0ee6 Regenerate with rust2rpm v24