$ git clone -n https://src.fedoraproject.org/rpms/wxGTK.git /var/lib/mock/f45-build-38526-725/root/chroot_tmpdir/scmroot/wxGTK
Cloning into '/var/lib/mock/f45-build-38526-725/root/chroot_tmpdir/scmroot/wxGTK'...
$ git fetch origin 86a7d493299ee7a10a9630ca24f7dbf044ad1693:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/wxGTK
 * [new ref]         86a7d493299ee7a10a9630ca24f7dbf044ad1693 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 86a7d49 Remove wxGTK3 obsoletes