SPM dependencies location option?

Wanted to use a new built-in SPM support in XCode 11 and faced a trouble: the resolved dependencies sources are located at DerivedData folder which is ignored in my git repository. So, my question is: is there any option for SPM to place the dependencies sources onto a specific folder, so I could commit them to git?
The reason of this is to decrease the build time in CI, so it wouldn't lose time to fetch all the dependencies from the network and also to keep my project being compilable at any commit I (or a CI machine) check out. Does SPM fetch the sources every time I do a DerivedData cleanup?