Description of problem:
During the gold age of 'yum', 'yum reinstall <packagename>' would reinstall the package and cleanup the existing duplicate (for example left by a broken transaction.)
'dnf' is unable to do it and there seems to be no other way to do it.

For example:

'yum-deprecated check' says:
...
zlib-1.2.8-9.fc23.i686 is a duplicate with zlib-1.2.8-7.fc22.i686

then we try to fix this manually:

"
# dnf reinstall zlib
Last metadata expiration check performed 1:27:28 ago on Tue Nov 24 15:46:41 2015.
Dependencies resolved.
================================================================================================================
 Package                  Arch                  Version                          Repository                Size
================================================================================================================
Reinstalling:
 zlib                     i686                  1.2.8-9.fc23                     fedora                    98 k
     replacing  zlib.i686 1.2.8-7.fc22
Removing:
 minizip                  i686                  1.2.8-7.fc22                     @System                   54 k

Transaction Summary
================================================================================================================
Remove  1 Package

Total size: 98 k
Is this ok [y/N]: y
Downloading Packages:
[SKIPPED] zlib-1.2.8-9.fc23.i686.rpm: Already downloaded                                                       
Running transaction check
Transaction check succeeded.
Running transaction test
The downloaded packages were saved in cache till the next successful transaction.
You can remove cached packages by executing 'dnf clean packages'.
Error: Transaction check error:
  file /usr/lib/libz.so.1.2.8 from install of zlib-1.2.8-9.fc23.i686 conflicts with file from package zlib-1.2.8-7.fc22.i686

Error Summary
-------------"
<actually, no error summary can be seen here>



Version-Release number of selected component (if applicable):


How reproducible:
always


Steps to Reproduce:
1.for any package that has a duplicate, try to reinstall it in order to remove the duplicate
2.
3.

Actual results:
package is not reinstalled, duplicate is not removed

Expected results:
package is reinstalled, duplicate is removed

Additional info:
Of course, ideally we should have a way to do this automatically for ALL duplicated packages.