$ git clone -n https://github.com/xcp-ng-rpms/blktap /var/lib/mock/v8.3-incoming-10738-29278/root/chroot_tmpdir/scmroot/blktap
Cloning into '/var/lib/mock/v8.3-incoming-10738-29278/root/chroot_tmpdir/scmroot/blktap'...
$ git fetch origin 9e7b201764eb5f8a0e6c7b0ceaacc555ca8a5b0b:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/blktap
 * [new ref]         9e7b201764eb5f8a0e6c7b0ceaacc555ca8a5b0b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9e7b201 fix segault on scan