To convert a repository from Bazaar to Git, follow these steps:

Getting set up

You're going to first need to get your computer set up to do it.

Install Breezy (the Python 3 version of Bazaar)

On Debian (and Debian-based systems like Ubuntu):

$ sudo apt install breezy

On Fedora:

$ sudo dnf install -y breezy

Checkout the repository

If you haven't already, you'll want to checkout the Bazaar repository:

$ brz checkout lp:openlp

Do the Conversion

First you'll need to initialise a git repository:

$ git init

Then you need to pipe a fast-export from Breezy into a fast-import in git:

$ brz fast-export --plain . | git fast-import

Once that is done, you'll want to check git's status to look for any problem files:

$ git status

Fix up any issues, and then you can push the repository to a remote repository:

$ git remote add origin https://server/repo
$ git push origin master

Finishing up

Finally, delete the .bzr directory:

$ rm -fr .bzr

And you're done!