$ git clone -n https://github.com/xcp-ng-rpms/xha.git /var/lib/mock/v8.3-incoming-9586-28337/root/chroot_tmpdir/scmroot/xha
Cloning into '/var/lib/mock/v8.3-incoming-9586-28337/root/chroot_tmpdir/scmroot/xha'...
$ git fetch origin 7c0f74e877b82a681b56c4e8cb262ee1288f37be:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/xha
 * [new ref]         7c0f74e877b82a681b56c4e8cb262ee1288f37be -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7c0f74e Merge branch 'XS-8.3' into master