$ git clone -n https://github.com/xcp-ng-rpms/blktap.git /var/lib/mock/v8.3-u-pcoval2-11481-29785/root/chroot_tmpdir/scmroot/blktap
Cloning into '/var/lib/mock/v8.3-u-pcoval2-11481-29785/root/chroot_tmpdir/scmroot/blktap'...
$ git fetch origin d8ec6274e28dfc8975684336ac7024c43c048e86:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/blktap
 * [new ref]         d8ec6274e28dfc8975684336ac7024c43c048e86 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d8ec627 bump release for test build