Does anyone have a good way to change repositories? A common example for me 
is, Sundials is in JuliaDiffEq, so I fork it to my Github account for an 
extended PR, but to work on it I need to remove my current Sundials install 
and clone from my own repository. However, METADATA does not like this at 
all:

julia> Pkg.rm("Sundials") # Remove the JuliaDiffEq/Sundials version
WARNING: unknown DataFrames commit 84523937, metadata may be ahead of 
package cache
INFO: No packages to install, update or remove
INFO: Package database updated

julia> Pkg.clone("https://github.com/ChrisRackauckas/Sundials.jl.git";) # 
Install from my Github
INFO: Cloning Sundials from 
https://github.com/ChrisRackauckas/Sundials.jl.git
ERROR: Sundials already exists
 in clone(::String, ::SubString{String}) at .\pkg\entry.jl:193
 in clone(::String) at .\pkg\entry.jl:221
 in 
(::Base.Pkg.Dir.##2#3{Array{Any,1},Base.Pkg.Entry.#clone,Tuple{String}})() 
at .\pkg\dir.jl:31
 in 
cd(::Base.Pkg.Dir.##2#3{Array{Any,1},Base.Pkg.Entry.#clone,Tuple{String}}, 
::String) at .\file.jl:58
 in #cd#1(::Array{Any,1}, ::Function, ::Function, ::String, 
::Vararg{Any,N}) at .\pkg\dir.jl:31
 in clone(::String) at .\pkg\pkg.jl:151

In the past I would just delete METADATA and let it re-create itself, and 
that will fix it, but then you have to re-install packages which can be a 
mess. Since this is becoming much more common for me, I need a better way 
to handle this. Does anyone have a better workflow?

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