$ git clone -n https://github.com/xcp-ng-rpms/blktap.git /var/lib/mock/v8.3-u-abourgeois2-8904-27859/root/chroot_tmpdir/scmroot/blktap
Cloning into '/var/lib/mock/v8.3-u-abourgeois2-8904-27859/root/chroot_tmpdir/scmroot/blktap'...
$ git fetch origin 294b32efacc6632fe621f03b5eca0f2e3e74b389:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/blktap
 * [new ref]         294b32efacc6632fe621f03b5eca0f2e3e74b389 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 294b32e bump release for test build