$ git clone -n https://src.fedoraproject.org/rpms/uchardet.git /var/lib/mock/f45-build-37573-716/root/chroot_tmpdir/scmroot/uchardet
Cloning into '/var/lib/mock/f45-build-37573-716/root/chroot_tmpdir/scmroot/uchardet'...
$ git fetch origin baadb8d3e45f3f09a047a068842ad639c621c340:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/uchardet
 * [new ref]         baadb8d3e45f3f09a047a068842ad639c621c340 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at baadb8d Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild