$ git clone -n https://github.com/xcp-ng-rpms/iputils.git /var/lib/mock/v8.3-u-pcoval2-10578-29132/root/chroot_tmpdir/scmroot/iputils
Cloning into '/var/lib/mock/v8.3-u-pcoval2-10578-29132/root/chroot_tmpdir/scmroot/iputils'...
$ git fetch origin ec276dbd980162fe490290d7ad1ffce82597167c:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/iputils
 * [new ref]         ec276dbd980162fe490290d7ad1ffce82597167c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ec276db bump release for test build