$ GIT_TRACE=2 git clone git@github.com:USER/Hello_Test
trace: built-in: git 'clone' 'git@github.com:USER/Hello_Test'
Cloning into 'Hello_Test'...
trace: run_command: 'C:\Putty\ssh.exe' 'git@github.com' 'git-upload-pack '\''USER/Hello_Test'\'''
error: cannot spawn C:\Putty\ssh.exe: No such file or directory
fatal: unable to fork