Re-attaching a git HEAD

Sometimes, it is necessary to re-attach a git clone to the HEAD of another (remote) instance. Since I never know, here’s the quick solution (via Stackoverflow/Louis Maddox)

1. create a branch that points to the commit currently pointed to by your detached HEAD:

   git branch temp
   git checkout temp
   

   _{(these two commands can be abbreviated as git checkout -b temp)}

2. then update (e.g.) master to point to it:

   git branch -f master temp
   git checkout master
   

   _{(these two commands can be abbreviated as git checkout -B master temp)}

3. Delete the temp branch

   git branch -d temp
   

4. Finally, you will probably want to push the reestablished history:

   git push origin master
   

All in one place for quick copy-and-paste:

git checkout -b temp
git checkout -B master temp
git branch -d temp
git push origin master