$ git clone -n https://src.fedoraproject.org/rpms/arpwatch.git /var/lib/mock/f41-build-852264-166310/root/chroot_tmpdir/scmroot/arpwatch
Cloning into '/var/lib/mock/f41-build-852264-166310/root/chroot_tmpdir/scmroot/arpwatch'...
$ git fetch origin 8bfc45d0608ac74dfe5b0c0243e406139c41bc47:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/arpwatch
 * [new ref]         8bfc45d0608ac74dfe5b0c0243e406139c41bc47 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8bfc45d Generate ethercodes.dat from latest oui.csv