$ git clone -n https://github.com/xcp-ng-rpms/emulex-lpfc-alt.git /var/lib/mock/v8.3-incoming-10818-29326/root/chroot_tmpdir/scmroot/emulex-lpfc-alt
Cloning into '/var/lib/mock/v8.3-incoming-10818-29326/root/chroot_tmpdir/scmroot/emulex-lpfc-alt'...
$ git fetch origin df5c2016316fe03fcd0fe58147a5989309bf97d8:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/emulex-lpfc-alt
 * [new ref]         df5c2016316fe03fcd0fe58147a5989309bf97d8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at df5c201 Add modifications in order to build an alternative driver