$ git clone -n https://src.fedoraproject.org/rpms/xdp-tools.git /var/lib/mock/f42-build-side-1-3580957-46825/root/chroot_tmpdir/scmroot/xdp-tools
Cloning into '/var/lib/mock/f42-build-side-1-3580957-46825/root/chroot_tmpdir/scmroot/xdp-tools'...
$ git fetch origin 9b4a916bdbe6f7d8db089495f85997241bd41b47:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xdp-tools
 * [new ref]         9b4a916bdbe6f7d8db089495f85997241bd41b47 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9b4a916 Update to upstream v1.5.5