Coho fails to update cordova-js repo

+ cordova-coho/coho repo-update -r tools -r medic -r paramedic
Running from E:\jenkins\workspace\cordova-periodic-build
E:\jenkins\workspace\cordova-periodic-build\cordova-coho\node_modules\co\index.js:290
    throw err;
    ^

Error: Aborted due to repo E:\jenkins\workspace\cordova-periodic-build\cordova-js not being on a named branch. E:\Software\Git\mingw64\bin\git.exe: Command failed with exit code 128 Error output:
fatal: Not a git repository (or any of the parent directories): .git
    at Object.exports.retrieveCurrentBranchName (E:\jenkins\workspace\cordova-periodic-build\cordova-coho\src\gitutil.js:79:15)
    at throw (native)
    at next (E:\jenkins\workspace\cordova-periodic-build\cordova-coho\node_modules\co\index.js:74:26)
    at E:\jenkins\workspace\cordova-periodic-build\cordova-coho\node_modules\co\index.js:102:18
    at _rejected (E:\jenkins\workspace\cordova-periodic-build\cordova-coho\node_modules\q\q.js:808:24)
    at E:\jenkins\workspace\cordova-periodic-build\cordova-coho\node_modules\q\q.js:834:30
    at Promise.when (E:\jenkins\workspace\cordova-periodic-build\cordova-coho\node_modules\q\q.js:1079:31)
    at Promise.promise.promiseDispatch (E:\jenkins\workspace\cordova-periodic-build\cordova-coho\node_modules\q\q.js:752:41)
    at E:\jenkins\workspace\cordova-periodic-build\cordova-coho\node_modules\q\q.js:574:44
    at flush (E:\jenkins\workspace\cordova-periodic-build\cordova-coho\node_modules\q\q.js:108:17)
Build step 'Execute shell' marked build as failure