I've found this script very useful in the past for finding large (and non-obvious) objects in a git repository:
#!/bin/bash#set -x # Shows you the largest objects in your repo's pack file.# Written for osx.## @see https://stubbisms.wordpress.com/2009/07/10/git-script-to-show-largest-pack-objects-and-trim-your-waist-line/# @author Antony Stubbs# set the internal field separator to line break, so that we can iterate easily over the verify-pack outputIFS=$'\n';# list all objects including their size, sort by size, take top 10objects=`git verify-pack -v .git/objects/pack/pack-*.idx | grep -v chain | sort -k3nr | head`echo "All sizes are in kB's. The pack column is the size of the object, compressed, inside the pack file."output="size,pack,SHA,location"allObjects=`git rev-list --all --objects`for y in $objectsdo # extract the size in bytes size=$((`echo $y | cut -f 5 -d ''`/1024)) # extract the compressed size in bytes compressedSize=$((`echo $y | cut -f 6 -d ''`/1024)) # extract the SHA sha=`echo $y | cut -f 1 -d ''` # find the objects location in the repository tree other=`echo "${allObjects}" | grep $sha` #lineBreak=`echo -e "\n"` output="${output}\n${size},${compressedSize},${other}"doneecho -e $output | column -t -s ', 'That will give you the object name (SHA1sum) of the blob, and then you can use a script like this one:
... to find the commit that points to each of those blobs.