$ git clone -n https://github.com/xcp-ng-rpms/zfs.git /var/lib/mock/v8.3-base-4138-4013/root/chroot_tmpdir/scmroot/zfs
Cloning into '/var/lib/mock/v8.3-base-4138-4013/root/chroot_tmpdir/scmroot/zfs'...
$ git reset --hard 23af0cf8626d40677348a063235180448f61f0f9
Downloading SOURCES/zfs-0.8.5.tar.gz (9.2 MB)
HEAD is now at 23af0cf Rebuild for XCP-ng 8.3 alpha