$ git clone -n https://github.com/xcp-ng-rpms/blktap /var/lib/mock/v9.0-u-ydi1-11233-29600/root/chroot_tmpdir/scmroot/blktap
Cloning into '/var/lib/mock/v9.0-u-ydi1-11233-29600/root/chroot_tmpdir/scmroot/blktap'...
$ git fetch origin cd4f7c4796c98880b37db392f2ab408231e84c8b:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/blktap
 * [new ref]         cd4f7c4796c98880b37db392f2ab408231e84c8b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cd4f7c4 bump release for test build