$ git clone -n https://github.com/xcp-ng-rpms/bind.git /var/lib/mock/v8.3-u-pcoval2-10037-28682/root/chroot_tmpdir/scmroot/bind
Cloning into '/var/lib/mock/v8.3-u-pcoval2-10037-28682/root/chroot_tmpdir/scmroot/bind'...
$ git fetch origin 492d2ef986e684fdea1dd1c824eac89c036ebda0:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/bind
 * [new ref]         492d2ef986e684fdea1dd1c824eac89c036ebda0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 492d2ef bump release for test build