$ git clone -n https://github.com/xcp-ng-rpms/iputils.git /var/lib/mock/v8.3-incoming-10043-28689/root/chroot_tmpdir/scmroot/iputils
Cloning into '/var/lib/mock/v8.3-incoming-10043-28689/root/chroot_tmpdir/scmroot/iputils'...
$ git fetch origin b320175308d02d3210cccee5b758f01974a8d0b2:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/iputils
 * [new ref]         b320175308d02d3210cccee5b758f01974a8d0b2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b320175 Update obsolete patch macro with autosetup