CODEWITHSUNDEEP
gitgit-reflog
Alexander Bird
Alexander Bird

Reputation: 40639

Can I view the reflog of a remote (not remote ref)?

Is it possible to view the reflog of a remote? That is, I want to know what the output of git reflog is on another remote machine.

Note that I am not asking for the reflog of remote-tracking branches (such as origin/master); I am asking for what reflog says on the other machine.

Upvotes: 95

Views: 50014

Answers (4)

Błażej Czapp
Błażej Czapp

Reputation: 2633

On the off chance that the remote machine is a github repository,

  1. First use Github’s Events API to retrieve the commit SHA.
    curl https://api.github.com/repos/<owner>/<repo>/events

  2. Identify the SHA of the orphan commit-id that no longer exists in any branch.

  3. Next, use Github’s Refs API to create a new branch pointing to the orphan commit.

    curl -i -H "Accept: application/json" -H "Content-Type: application/json" -X POST -d '{"ref":"refs/heads/D-commit", "sha":"<orphan-commit-id>"}' https://api.github.com/repos/<owner>/<repo>/git/refs

Replace <orphan-commit-id> in the above command with the SHA identified in step 2.

  1. Finally git fetch the newly created branch into your local repository.
    From there you can cherry-pick or merge the commit(s) back into your work.

Write requests (step 3) require an Authentication header – but you can also use the corresponding api client feature of the GitHub CLI tool, e.g.: gh api repos/<owner>/<repo>/git/refs -X POST -F ref=refs/heads/D-commit -F sha=<orphan-commit-id>

Check out this article for an actual example.

Upvotes: 73

Jaime Bellmyer
Jaime Bellmyer

Reputation: 23307

You can use this command to view remote reflogs:

git reflog refs/remotes/<remote name>/<branch name>

So if your remote is called "origin", and your branch is "turtles":

git reflog refs/remotes/origin/turtles

Upvotes: 1

JeanValjean
JeanValjean

Reputation: 17713

On GitHub, if you did by mistake a git push --force on master before to fetch the merged changes and in the meanwhile the merged branch was deleted (yeah, it happened to me), you can look for the merged pull request and go to the Commits section, e.g:

enter image description here

Then you go on the last commit and click on the <> button (that has title "Browse the repository at this point in the history").

This will bring you to the "deleted" point of history. From here you can:

  • create a new branch and then open a new pull request (recommended if the change comes from another repository).
  • open a new pull request (recommended for commits inside your repository).

Upvotes: 9

torek
torek

Reputation: 488183

The answer is basically "no" (except on that machine), because the reflog is a log of locally-made re-assignments of some ref-name. Essentially, every time you run git update-ref -m msg <name> <target> the update is logged ... locally: .git/logs/<name> gets a line appended:

$ git update-ref -m foo HEAD HEAD^
$ tail -1 .git/logs/HEAD
2418b6ba8fd0289933c9351260a272b8e410867f 8d945134b0cead535d66af29c8eb4228b5dc3763 [redacted] <[redacted]> 1334106483 -0600     foo

(the thing before the message, in this case foo, is not spaces but rather a tab; I expanded it for SO purposes). Conceptually, everything else that moves a branch tip invokes git update-ref to do it (some are shell scripts and literally do that, others just invoke the C code that does all the file-updating) ... and everything in .git/logs makes up the reflog.

If there were things in the underlying git:// and/or ssh:// protocols that let you get at the reflog, that would do it, but as far as I know there isn't.

Upvotes: 59

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