$ git clone -n https://src.fedoraproject.org/rpms/wxGTK.git /var/lib/mock/f42-build-side-1-3555813-46656/root/chroot_tmpdir/scmroot/wxGTK
Cloning into '/var/lib/mock/f42-build-side-1-3555813-46656/root/chroot_tmpdir/scmroot/wxGTK'...
$ git fetch origin 9892600e9aa527636cd6ba75ff8f4b3e4bb1f245:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/wxGTK
 * [new ref]         9892600e9aa527636cd6ba75ff8f4b3e4bb1f245 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9892600 Update to new upstream release 3.2.8 (#2363255)