$ git clone -n https://src.fedoraproject.org/rpms/wdiff.git /var/lib/mock/f45-build-38294-723/root/chroot_tmpdir/scmroot/wdiff
Cloning into '/var/lib/mock/f45-build-38294-723/root/chroot_tmpdir/scmroot/wdiff'...
$ git fetch origin 85e212edb42882a0da7285f67802e0bc1ac5092c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/wdiff
 * [new ref]         85e212edb42882a0da7285f67802e0bc1ac5092c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 85e212e F45+: Drop i686 support (leaf package)