Install abapgit and follow the links

From 2020

You have to install EUI library first

Due to installation problems

the aqo_ui5 version should installed separately as an add-in

** If you do not know the proxy parameters for ZABAPGIT_TEST_SSL

or you don’t have permission to add certificates in STRUST

or you cannot add parameters to /usr/sap/ED1/SYS/profile/DEFAULT.PFL
ssl/client_ciphersuites = 150:PFS:HIGH::EC_P256:EC_HIGH
ssl/ciphersuites = 135:PFS:HIGH::EC_P256:EC_HIGH ** then download zip file

** create offline project and import the zip file **

Video instruction

Installing certificates is optional