Recreate a git branch clean

clean_branch.sh

#!/bin/bash                                                               

# We want to clear out the "rc" branch. To do that, we need               
# to be on a different branch. We'll get onto "master".                   

# Does master exist? The first command's status code                      
# will be "0" if the branch exists.                                       
git show-ref --verify --quiet refs/heads/master
MASTER_EXISTS=$?

# If master doesn't exist, let's fetch it.                                
if [[ $MASTER_EXISTS != "0" ]]; then
    git fetch origin master:master
fi

# Switch to the master branch.                                            
git checkout master

# Now we can delete rc.                                                   
# Let's suppress errors. If rc does exist, great, we can delet it.        
# If not, we don't need to know that error.                               
git branch -D rc > /dev/null 2>&1

# At this point, it's safe to create rc and check it out.                 
git fetch origin rc:rc
git checkout rc

# Do your FOO.                                                            

# Now delete master if it didn't exist before,                            
# to return the system to its original state.                             
if [[ $MASTER_EXISTS !=	"0" ]];	then
    git	branch -D master
fi