Has anyone experienced this and have a fix/workaround? So far the only thing that works is disabling the driver altogether.
See discussions on these two issues - both caused (at least in a few circumstances) by radeon drivers.
Git commands have a 2-3 second delay before returning to the prompt · Issue #1070 · git-for-windows/git · GitHub
2.11.1 slow enough to make it unusable in Windows 10 x64 - upgraded from 2.9 lighting fast · Issue #1071 · git-for-windo…
It is possible to compile either stable or development version of radeon from git. the below link may help you with the solution:
Retrieving data ...