$ git clone -n https://github.com/xcp-ng-rpms/blktap.git /var/lib/mock/v8.3-u-pcoval2-10598-29153/root/chroot_tmpdir/scmroot/blktap
Cloning into '/var/lib/mock/v8.3-u-pcoval2-10598-29153/root/chroot_tmpdir/scmroot/blktap'...
$ git fetch origin 3e7fd6c26da9076fcb50f46e65ce9816b40eff0c:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/blktap
 * [new ref]         3e7fd6c26da9076fcb50f46e65ce9816b40eff0c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3e7fd6c bump release for test build