Before answering, let's add some background, explaining what this HEAD is.
First of all what is HEAD?
HEAD is simply a reference to the current commit (latest) on the current branch.
There can only be a single HEAD at any given time (excluding git worktree).
The content of HEAD is stored inside .git/HEAD and it contains the 40 bytes SHA-1 of the current commit.
detached HEAD
If you are not on the latest commit - meaning that HEAD is pointing to a prior commit in history it's called detached HEAD.
On the command line, it will look like this - SHA-1 instead of the branch name since the HEAD is not pointing to the tip of the current branch:
A few options on how to recover from a detached HEAD:
Kod: Zaznacz cały
git checkout
git checkout <commit_id>
git checkout -b <new branch> <commit_id>
git checkout HEAD~X // x is the number of commits to go back
This will checkout the new branch pointing to the desired commit.
This command will checkout to a given commit.
At this point, you can create a branch and start to work from this point on.
# Checkout a given commit.
# Doing so will result in a `detached HEAD` which mean that the `HEAD`
# is not pointing to the latest so you will need to checkout branch
# in order to be able to update the code.
# Create a new branch forked to the given commit
You can always use the reflog as well.
git reflog will display any change which updated the HEAD and checking out the desired reflog entry will set the HEAD back to this commit.
Every time the HEAD is modified there will be a new entry in the reflog
This will get you back to your desired commit
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