$ git clone -n https://src.fedoraproject.org/rpms/kf5-khtml.git /var/lib/mock/f45-build-14845-464/root/chroot_tmpdir/scmroot/kf5-khtml
Cloning into '/var/lib/mock/f45-build-14845-464/root/chroot_tmpdir/scmroot/kf5-khtml'...
$ git fetch origin 39f6c37383b0fadf478d57711e46df96155812be:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf5-khtml
 * [new ref]         39f6c37383b0fadf478d57711e46df96155812be -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 39f6c37 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild