How to handle gitpython clone exceptions?

I'm trying to write a batch clone script with GitPython, however I can't find a valid example of hanlding such as git url not exsits, download interupt etc.

How could I actually do this？

my exsiting code:

giturl = 'https://github.com/'+username+'/'+hwName+'.git'
targeturl = os.path.join(hwfolder,username+'-'+hwName)
try:
    repo = Repo.clone_from(giturl, targeturl, branch='master')
except:
    #git url not reachable
    #download interupt
    #target local path problem