[issue]
git fetch failed on PyCharm (Android Studio, IntelliJ IDEA, etc.)

[environment]
Ubuntu
after auto update libraries
under network proxy

[error details]
Fetch failed
fatal: unable to access
'xxxxx.git':
gnutls_handshake() failed: A TLS packet with unexpected length was recieved.

Then got an another error.

Fetch failed
fatal: unable to acccess
'xxxxx.git'
GnuTLS recv error(-9): A TLS packet with unexpected length was received.

[cause]

Got reason of the problem, it was gnutls package. It's working weird behind a proxy.

[measure]

we should compile git with openssl.

[elapsed time]
It took about an hour to build the package.