If one would checkout a branch:
git checkout 760ac7e
from e.g. b9ac70b, how can one go back to the last known head b9ac70b without knowing its SHA1?
If one would checkout a branch:
git checkout 760ac7e
from e.g. b9ac70b, how can one go back to the last known head b9ac70b without knowing its SHA1?
You may have made some new commits in the detached HEAD state. I believe if you do as other answers advise:
git checkout master
# or
git checkout -
then you may lose your commits!! Instead, you may want to do this:
# you are currently in detached HEAD state
git checkout -b commits-from-detached-head
and then merge commits-from-detached-head into whatever branch you want, so you don't lose the commits.
In general: git checkout <branch*> (git checkout master is a special case).
*from which we (accidentally) detached a commit (using git checkout <commit_hash>)
Just in case anyone has the same edge case as me: I have a branch called test and was trying to make a branch called test/my-experimental-feature. That confused git because it thought I was referring to a branch that already exists. I changed it to test--my-experimental-feature and it worked fine.