$ git clone -n https://github.com/xcp-ng-rpms/blktap.git /var/lib/mock/v8.3-u-pcoval2-11477-29781/root/chroot_tmpdir/scmroot/blktap
Cloning into '/var/lib/mock/v8.3-u-pcoval2-11477-29781/root/chroot_tmpdir/scmroot/blktap'...
$ git fetch origin 1184692db7feb91678ee49fc6c880910600617ad:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/blktap
 * [new ref]         1184692db7feb91678ee49fc6c880910600617ad -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1184692 bump release for test build