$ git clone -n https://src.fedoraproject.org/rpms/qt5-qtwebkit.git /var/lib/mock/f39-build-1865690-42547/root/chroot_tmpdir/scmroot/qt5-qtwebkit
Cloning into '/var/lib/mock/f39-build-1865690-42547/root/chroot_tmpdir/scmroot/qt5-qtwebkit'...
$ git fetch origin 960dd8639a531d067bb98e0e456e719a000d67a6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qt5-qtwebkit
 * [new ref]         960dd8639a531d067bb98e0e456e719a000d67a6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 960dd86 Include more webkitgtk optimizations