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Git commands i was unaware of !

Git basics and continued...!

Add all the deleted files using 'git add -u'. This will add all the files in git including the deleted files.

If you only want to add deleted files, try:
git ls-files --deleted | xargs  
git commit

Once you clone a project, check out the branches present using,

git branch -a or git branch -r for remote branches.

See the contents of any object using git show

Check for the space occupied by object database to 

git count-objects -v
git verify-pack -v .git/objects/pack/pack-*.idx
To check if connection to host is established.
ssh -vT git@github.com

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