$ git clone -n https://src.fedoraproject.org/rpms/arpwatch.git /var/lib/mock/f41-build-59081101-6570913/root/chroot_tmpdir/scmroot/arpwatch
Cloning into '/var/lib/mock/f41-build-59081101-6570913/root/chroot_tmpdir/scmroot/arpwatch'...
$ git fetch origin 989c70cb3b927086be7deb53bec47355b18fb321:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/arpwatch
 * [new ref]         989c70cb3b927086be7deb53bec47355b18fb321 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 989c70c Generate ethercodes.dat from latest oui.csv