$ git clone -n https://github.com/xcp-ng-rpms/blktap.git /var/lib/mock/v8.3-incoming-11491-29795/root/chroot_tmpdir/scmroot/blktap
Cloning into '/var/lib/mock/v8.3-incoming-11491-29795/root/chroot_tmpdir/scmroot/blktap'...
$ git fetch origin 0de476173f51a7bd218d5a944c50b83209185674:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/blktap
 * [new ref]         0de476173f51a7bd218d5a944c50b83209185674 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0de4761 Merge pull request #18 from xcp-ng-rpms/8.3-qcow2