If you add this to your .ssh/config, ssh will reuse a single connection if you're doing multiple ssh operations to the same host. this can really speed up git ssh operations to gitlab/github

𝙷𝚘𝚜𝚝 *
  𝙲𝚘𝚗𝚝𝚛𝚘𝚕𝙿𝚊𝚝𝚑 "~/.𝚜𝚜𝚑/𝚌𝚘𝚗𝚝𝚛𝚘𝚕–%𝚛@%𝚑:%𝚙"
  𝙲𝚘𝚗𝚝𝚛𝚘𝚕𝙼𝚊𝚜𝚝𝚎𝚛 𝚊𝚞𝚝𝚘
  𝙲𝚘𝚗𝚝𝚛𝚘𝚕𝙿𝚎𝚛𝚜𝚒𝚜𝚝 𝟸𝚖