I was getting quite a lot of spams too. So, I ended up creating a brand new email address and rewriting name and email with: git filter-branch -f --env-fil

I was getting quite a lot of spams too. So, I ended up creating a brand new email address and rewriting name and email with: git filter-branch -f --env-filter \ "GIT_AUTHOR_NAME='Newname'; GIT_AUTHOR_EMAIL='newemail'; \ GIT_COMMITTER_NAME='committed-name'; GIT_COMMITTER_EMAIL='committed-email';" HEAD