$ git clone -n https://github.com/xcp-ng-rpms/blktap /var/lib/mock/v9.0-u-ydi1-11218-29596/root/chroot_tmpdir/scmroot/blktap
Cloning into '/var/lib/mock/v9.0-u-ydi1-11218-29596/root/chroot_tmpdir/scmroot/blktap'...
$ git fetch origin 3768e9e23221932a73c7f586054084f5c50f7192:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/blktap
 * [new ref]         3768e9e23221932a73c7f586054084f5c50f7192 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3768e9e bump release for test build