One even-better approach IMHO

Just keep a .gitconfig in your HOME with aliases for your identities. Then just after initializing/cloning the repo do git config-company or git config-personal

    er453r@r7:~$ cat ~/.gitconfig 
    [user]
        useConfigOnly = true
    [alias]
        config-personal = !echo CONFIG-PERSONAL && \
            git config --local user.email 'personal@email.com' && \
            git config --local user.name 'personal' && \
            git config --local core.sshCommand 'ssh -i ~/.ssh/id_rsa_personal'
        config-company = !echo OLD CONFIG-COMPANY && \
            git config --local user.email 'official@comapny.io' && \
            git config --local user.name 'Name Surname' && \
            git config --local core.sshCommand 'ssh -i ~/.ssh/id_rsa_company'