$ git clone -n https://github.com/xcp-ng-rpms/xcp-python-libs /var/lib/mock/v8.3-incoming-9977-28643/root/chroot_tmpdir/scmroot/xcp-python-libs
Cloning into '/var/lib/mock/v8.3-incoming-9977-28643/root/chroot_tmpdir/scmroot/xcp-python-libs'...
$ git fetch origin 8aaa32ba46497da08a632fe445f6ca6d1402a13e:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/xcp-python-libs
 * [new ref]         8aaa32ba46497da08a632fe445f6ca6d1402a13e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8aaa32b Merge pull request #8 from xcp-ng-rpms/8.3-rebase-XS-1785