$ git clone -n https://src.fedoraproject.org/rpms/rust-ipnetwork0.17.git /var/lib/mock/f39-build-1521856-35863/root/chroot_tmpdir/scmroot/rust-ipnetwork0.17
Cloning into '/var/lib/mock/f39-build-1521856-35863/root/chroot_tmpdir/scmroot/rust-ipnetwork0.17'...
$ git fetch origin 2424eed71bc90e94110d21116d8bad553933d196:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-ipnetwork0.17
 * [new ref]         2424eed71bc90e94110d21116d8bad553933d196 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2424eed Regenerate with rust2rpm v24