git : fatal: early EOF fatal: index-pack failed

First, turn off compression:

git config --global core.compression 0

Next, let’s do a partial clone to truncate the amount of info coming down:

git clone --depth 1 <repo_URI>

When that works, go into the new directory and retrieve the rest of the clone:

git fetch --unshallow 

or, alternately,

git fetch --depth=2147483647

Now, do a regular pull:

git pull --all

I think there is a glitch with msysgit in the 1.8.x versions that exacerbates these symptoms, so another option is to try with an earlier version of git (<= 1.8.3, I think).