$ git clone -n https://src.fedoraproject.org/rpms/libchardet.git /var/lib/mock/f45-build-15972-481/root/chroot_tmpdir/scmroot/libchardet
Cloning into '/var/lib/mock/f45-build-15972-481/root/chroot_tmpdir/scmroot/libchardet'...
$ git fetch origin 26bf9ed5b8ad789b31e23e119b0f562b01dd61d7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libchardet
 * [new ref]         26bf9ed5b8ad789b31e23e119b0f562b01dd61d7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 26bf9ed Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild