$ git clone -n https://github.com/xcp-ng-rpms/blktap.git /var/lib/mock/v8.3-u-abourgeois2-11197-29586/root/chroot_tmpdir/scmroot/blktap
Cloning into '/var/lib/mock/v8.3-u-abourgeois2-11197-29586/root/chroot_tmpdir/scmroot/blktap'...
$ git fetch origin c6398b081dc1767554226037f32d9d631d2956da:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/blktap
 * [new ref]         c6398b081dc1767554226037f32d9d631d2956da -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c6398b0 bump release for test build