How geth-sharding was pruned of all geth commits

gistfile1.txt

git filter-branch --commit-filter '
    if echo $GIT_AUTHOR_NAME | grep -F -f /tmp/list >/dev/null;
	then
		git commit-tree "$@";
	else
		skip_commit "$@";
	fi' HEAD

gistfile2.txt

# Verify the list of authors
git shortlog -sn

# If any are still present (i.e. anyone that had a partial match)
# then remove these individually
git filter-branch --commit-filter '
	if [ "$GIT_AUTHOR_NAME" = "Elias Naur" ];
	then
		skip_commit "$@";
	else
		git commit-tree "$@";
	fi' HEAD

list

Raul Jordan 
Terence Tsao 
Preston Van Loon 
nisdas 
Fynn 
Eli 
Yutaro Mori 
Nishant Das 
Kushagra Sharma 
The Gitter Badger 
Mike Rowehl