$ git clone -n https://github.com/xcp-ng-rpms/xha.git /var/lib/mock/v8.3-incoming-9367-28121/root/chroot_tmpdir/scmroot/xha
Cloning into '/var/lib/mock/v8.3-incoming-9367-28121/root/chroot_tmpdir/scmroot/xha'...
$ git fetch origin 36b1d7d6013df3cb9b412556f4de3e6cc8212d09:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/xha
 * [new ref]         36b1d7d6013df3cb9b412556f4de3e6cc8212d09 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 36b1d7d Merge pull request #6 from xcp-ng-rpms/8.3-update-25.1.0-1