`failed to resolve address` with custom ssh hostname for github

[jmelahman]

It's common to use multiple ssh keys for authenticating with various projects. With a non-default hostname for github.com, git metrics fails with,

$ git metrics -v pull
2025-02-06T21:54:48.350455Z ERROR git_metrics::backend::git2: unable to pull metrics: Error { code: -1, klass: 12, message: "failed to resolve address for github.com-applied: Name or service not known" }
unable to pull metrics


	failed to resolve address for github.com-applied: Name or service not known; class=Net (12)

Minimal ~/.ssh/config

Host github.com-example
    Hostname github.com

Repro steps:

git remote set-url origin git@github.com-example:jdrouet/git-metrics.git
git pull origin main  # works
git metrics pull  # fails

[jdrouet]

Thanks for the feedback, I'll try to find some time to fix it.
Feel free to open a pull request 😉