$ git clone -n https://github.com/xcp-ng-rpms/blktap.git /var/lib/mock/v8.3-u-abourgeois2-9947-28630/root/chroot_tmpdir/scmroot/blktap
Cloning into '/var/lib/mock/v8.3-u-abourgeois2-9947-28630/root/chroot_tmpdir/scmroot/blktap'...
$ git fetch origin a8ee7bacf470fb1446a6d7b688058b1085c30b98:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/blktap
 * [new ref]         a8ee7bacf470fb1446a6d7b688058b1085c30b98 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a8ee7ba bump release for test build