$ git commit -m "Project snapshot"
On branch master
nothing to commit, working directory clean
$ react-native-git-upgrade 
git-upgrade info Check for updates 
...
git-upgrade info Add all files to commit 
git-upgrade info Commit current project sources 

*** Please tell me who you are.
Run
git config --global user.email "you@example.com"
git config --global user.name "Your Name"

to set your account's default identity.
Omit --global to set the identity only in this repository.

fatal: unable to auto-detect email address (got 'locus@cobalt.(none)')
git-upgrade ERR! An error occurred during upgrade: 
git-upgrade ERR! Error: Command 'git commit -m "Project snapshot"' exited with code 128:
stderr: undefined
...