$ git clone -n https://src.fedoraproject.org/rpms/kf5-kdewebkit.git /var/lib/mock/f45-build-14822-464/root/chroot_tmpdir/scmroot/kf5-kdewebkit
Cloning into '/var/lib/mock/f45-build-14822-464/root/chroot_tmpdir/scmroot/kf5-kdewebkit'...
$ git fetch origin c5c72a2a1a8bef8f6a07e508ee9623c2883fefd8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf5-kdewebkit
 * [new ref]         c5c72a2a1a8bef8f6a07e508ee9623c2883fefd8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c5c72a2 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild