$ git clone -n https://src.fedoraproject.org/rpms/perl-Kwiki-UserPreferences.git /var/lib/mock/f41-build-1053421-19286/root/chroot_tmpdir/scmroot/perl-Kwiki-UserPreferences
Cloning into '/var/lib/mock/f41-build-1053421-19286/root/chroot_tmpdir/scmroot/perl-Kwiki-UserPreferences'...
$ git fetch origin 8dae7f3a4df5fe49fc14c8f53a1c2d52e86e1db9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Kwiki-UserPreferences
 * [new ref]         8dae7f3a4df5fe49fc14c8f53a1c2d52e86e1db9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8dae7f3 Eliminate use of obsolete %patchN syntax (#2283636)