(#3618) Fix pushing a branch to remote with a different name causing error (#3630)

- **PR Description**

This fixes an error where, given the user wants push a branch to a
remote branch with a different name, the following error would be
presented:

```
Error
error: src refspec <desired remote branch name> does not match any
error: failed to push some refs to <remote .git URI>
```


- **Please check if the PR fulfills these requirements**

* [x] Cheatsheets are up-to-date (run `go generate ./...`)
* [x] Code has been formatted (see
[here](https://github.com/jesseduffield/lazygit/blob/master/CONTRIBUTING.md#code-formatting))
* [x] Tests have been added/updated (see
[here](https://github.com/jesseduffield/lazygit/blob/master/pkg/integration/README.md)
for the integration test guide)
* [x] Text is internationalised (see
[here](https://github.com/jesseduffield/lazygit/blob/master/CONTRIBUTING.md#internationalisation))
* [x] Docs have been updated if necessary
* [x] You've read through your own file changes for silly mistakes etc

0 files changed, 0 insertions, 0 deletions