Why did my Git repo enter a detached HEAD state?
I ended up with a detached head today, the same problem as described in: git push says everything up-to-date even though I have local changes
As far as I know I didn't do anything out of the ordinary, just commits and pushes from my local repo.
So how did I end up with a detached HEAD ?
Any checkout of a commit that is not the name of one of your branches will get you a detached HEAD. A SHA1 which represents the tip of a branch would still gives a detached HEAD. Only a checkout of a local branch name avoids that mode.
See committing with a detached HEAD
When HEAD is detached, commits work like normal, except no named branch gets updated. (You can think of this as an anonymous branch.)
For example, if you checkout a "remote branch" without tracking it first, you can end up with a detached HEAD.
See git: switch branch without detaching head
I reproduced this just now by accident:
lists the remote branches
git branch -r
origin/Feature/f1234
origin/master
I want to checkout one locally, so I cut paste:
git checkout origin/Feature/f1234
Presto! Detached HEAD state
You are in 'detached HEAD' state. [...])
Solution #1:
Do not include origin/ at the front of my branch spec when checking it out:
git checkout Feature/f1234
Solution #2:
Add -b parameter which creates a local branch from the remote
git checkout -b origin/Feature/f1234 or
git checkout -b Feature/f1234 it will fall back to origin automatically
try
git reflog
this gives you a history of how your HEAD and branch pointers where moved in the past.
eg :
88ea06b HEAD@{0}: checkout: moving from DEVELOPMENT to remotes/origin/SomeNiceFeature e47bf80 HEAD@{1}: pull origin DEVELOPMENT: Fast-forward
the top of this list is one reasone one might encounter a DETACHED HEAD state ... checking out a remote tracking branch.
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