$ git clone -n https://github.com/xcp-ng-rpms/blktap /var/lib/mock/v9.0-u-ydi1-11222-29597/root/chroot_tmpdir/scmroot/blktap
Cloning into '/var/lib/mock/v9.0-u-ydi1-11222-29597/root/chroot_tmpdir/scmroot/blktap'...
$ git fetch origin 3b3cfa1dbe2a799b46044d51047c5893299bbc3b:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/blktap
 * [new ref]         3b3cfa1dbe2a799b46044d51047c5893299bbc3b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3b3cfa1 bump release for test build