[Bug 1967813] [NEW] git config pull.rebase not observed

[Joe Barnett]

Public bug reported:

I have pull.rebase=true and pull.ff=only set up in my global git config:

```
[pull]
	ff = only
	rebase = true

```

however in jammy, when I git pull with a local commit, I get the following error:
```
fatal: Not possible to fast-forward, aborting.
```

doing a git pull --rebase does the right thing (but should not be necessary with this config?):
```
Successfully rebased and updated refs/heads/main.

```

In impish the pull.rebase appeared to be observed properly.

ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: git 1:2.34.1-1ubuntu1
Uname: Linux 5.17.0-051700drmtip20220329-generic x86_64
ApportVersion: 2.20.11-0ubuntu80
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: GNOME
Date: Mon Apr  4 14:21:29 2022
InstallationDate: Installed on 2019-08-17 (961 days ago)
InstallationMedia: Ubuntu 19.04 "Disco Dingo" - Alpha amd64 (20190305.1)
RebootRequiredPkgs: Error: path contained symlinks.
SourcePackage: git
UpgradeStatus: Upgraded to jammy on 2022-03-18 (17 days ago)

** Affects: git (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug jammy wayland-session

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https://bugs.launchpad.net/bugs/1967813

Title:
  git config pull.rebase not observed

Status in git package in Ubuntu:
  New

Bug description:
  I have pull.rebase=true and pull.ff=only set up in my global git
  config:

  ```
  [pull]
  	ff = only
  	rebase = true

  ```

  however in jammy, when I git pull with a local commit, I get the following error:
  ```
  fatal: Not possible to fast-forward, aborting.
  ```

  doing a git pull --rebase does the right thing (but should not be necessary with this config?):
  ```
  Successfully rebased and updated refs/heads/main.

  ```

  In impish the pull.rebase appeared to be observed properly.

  ProblemType: Bug
  DistroRelease: Ubuntu 22.04
  Package: git 1:2.34.1-1ubuntu1
  Uname: Linux 5.17.0-051700drmtip20220329-generic x86_64
  ApportVersion: 2.20.11-0ubuntu80
  Architecture: amd64
  CasperMD5CheckResult: unknown
  CurrentDesktop: GNOME
  Date: Mon Apr  4 14:21:29 2022
  InstallationDate: Installed on 2019-08-17 (961 days ago)
  InstallationMedia: Ubuntu 19.04 "Disco Dingo" - Alpha amd64 (20190305.1)
  RebootRequiredPkgs: Error: path contained symlinks.
  SourcePackage: git
  UpgradeStatus: Upgraded to jammy on 2022-03-18 (17 days ago)

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