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Or using .ssh/config since entries in there act like hostnames: # ~/.ssh/config Host github_ssh HostName github.com User git Id

Or using .ssh/config since entries in there act like hostnames: # ~/.ssh/config Host github_ssh HostName github.com User git IdentityFile ~/.ssh/my_github_key > git remote add github github_ssh:Username/RepoName.git This has worked reliably for me for quite a while now.

fisian 2y ago
However, this doesn't work well with git submodules, because then everyone cloning the repo must recreate this config. (Just something to be aware of.)
- 3np 2y ago
  It works fine if coupled with URL replacement. The custom hostname will be replaced transparantly for you and won't need to make it into gitmodules. # ~/.config/git/config # Only for single user/org [url "git@github_ssh:foo"] insteadOf = "git@github.com:foo" # all the things [url "git@github_ssh"] insteadOf = "git@github.com" Similar pattern if you want to force-use ssh instead of https or vice-versa.