$ git clone -n https://github.com/xcp-ng-rpms/bind.git /var/lib/mock/v8.3-incoming-9042-27920/root/chroot_tmpdir/scmroot/bind
Cloning into '/var/lib/mock/v8.3-incoming-9042-27920/root/chroot_tmpdir/scmroot/bind'...
$ git fetch origin 730f25ab0d2b8e97c4a2f867ba70f2a36b865b04:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/bind
 * [new ref]         730f25ab0d2b8e97c4a2f867ba70f2a36b865b04 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 730f25a Import bind-9.9.4-63.xs8.src.rpm