Right now the mongo java has evergreen task

  "fetch-source":
    # Executes git clone and applies the submitted patch, if any
    - command: git.get_project
      params:
        directory: "src"

this is an equivalent to 

git clone https://github.com/mongodb/mongo-java-driver.git 

In my local it takes around 2 minutes and .git folder is 150MB long

If we do 

git clone https://github.com/mongodb/mongo-java-driver.git  --depth 1

instead

then it takes a few seconds without a git history

Let's change evergreen to skip git history