$ git clone -n https://github.com/xcp-ng-rpms/blktap.git /var/lib/mock/v8.3-u-abourgeois1-10190-28772/root/chroot_tmpdir/scmroot/blktap
Cloning into '/var/lib/mock/v8.3-u-abourgeois1-10190-28772/root/chroot_tmpdir/scmroot/blktap'...
$ git fetch origin 9d41fcdc13da8a64d4acb1a914990639b8140e5f:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/blktap
 * [new ref]         9d41fcdc13da8a64d4acb1a914990639b8140e5f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9d41fcd bump release for test build