Bitbucket Repository Showing large size which is not really there once clone the repo!!!

Dear Support

The below repository showing 1.7 GB and says size going to exceed 2GB.But when I clone this to my pc this repository just only 208 MB.

repo: git clone git@bitbucket.org:dfndc/pro10.git

further in the download section repo size showing 1.7 GB .but If I download this .zip file it will be just below 70MB.

Please advice how should I resolve this .

Regards
Raveendra