Git Checkout Command

Checkout command allows us to create and switch to different branch
It can be used to view old versions of the repository
It can also be used to restore files from old snapshot

Checkout is used to change the location of the HEAD pointer

# Checkout the project at an earlier stage
git checkout <commit-id>
 
# View version of the file represented by HEAD
# Uncommitted changes will be lost
git checkout <filename>
 
# Similar to above command but it is with respect to a specific commit
# It has the effect similar to restoring old version of file
git checkout <commit-id> <filename> 
 
# Sync local branch with the upstream version of the same branch
git checkout --track <upstream-repo>/<branch-name>

--track command will also create a new branch with the same name as the upstream branch on the local system

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