$ git clone -n https://github.com/xcp-ng-rpms/openssl.git /var/lib/mock/v8.3-incoming-10624-29178/root/chroot_tmpdir/scmroot/openssl
Cloning into '/var/lib/mock/v8.3-incoming-10624-29178/root/chroot_tmpdir/scmroot/openssl'...
$ git fetch origin 5ddabd58ecadf0c96408edd1309a4465da426518:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/openssl
 * [new ref]         5ddabd58ecadf0c96408edd1309a4465da426518 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5ddabd5 Merge pull request #6 from xcp-ng-rpms/pcoval/review/master