Agregar la key existente para Git en Cygwin

Tengo mi llave configurada como installation de GIT inpdenedent para nuestro repository local. Puedo hacer todos los commands de git de Git Bash Prompot. Recientemente, instalé cygwin y quiero usar git desde allí.

Intenté ejecutar el command ssh-add y no funcionó … ver abajo

user@computer_name /cygdrive/d/folder/cheftesting $ ssh-add /cygdrive/c/Users/user/.ssh/id_rsa 0 [main] ssh-add 8656 stdio_init: couldn't make stderr distinct from stdout user@computer_name /cygdrive/d/folder/cheftesting $ git clone git@gitlab.domain.net:project-chef/proj.git Cloning into 'proj'... The authenticity of host 'gitlab.domain.net (ip_address)' can't be established. ECDSA key fingerprint is xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx. Are you sure you want to continue connecting (yes/no)? Host key verification failed. fatal: Could not read from remote repository. Please make sure you have the correct access rights and the repository exists.