Use --show-current to print the current git branch

Since Git version 2.22 you can easily get the current branch name in your git repository with the --show-current option to the branch subcommand.

$ git branch --show-current
main

Git version 2.22 was released in 2019, so by now the above will probably be available to you. If not there is still the old way of doing things. In the old way of doing things you may get the current branch name via the rev-parse command.

$ git rev-parse --abbrev-ref HEAD
main

And then there is also just the git branch command which might serve you just fine. Instead of just the current branch this command shows you all the local branch and prefixes the currently active branch with an asterisk (*).

$ git branch
  dev
* main