$ git clone -n https://github.com/xcp-ng-rpms/ethtool /var/lib/mock/v8.3-incoming-8923-27873/root/chroot_tmpdir/scmroot/ethtool
Cloning into '/var/lib/mock/v8.3-incoming-8923-27873/root/chroot_tmpdir/scmroot/ethtool'...
$ git fetch origin 078f11b146d42d8346ae58cbf7b6b56798504349:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/ethtool
 * [new ref]         078f11b146d42d8346ae58cbf7b6b56798504349 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 078f11b Merge branch 'XS-8.3' into 8.3-import_ethtool-4.19-3.xs8.src.rpm