$ git clone -n https://src.fedoraproject.org/rpms/qt5-qtwebkit.git /var/lib/mock/f41-build-812281-147777/root/chroot_tmpdir/scmroot/qt5-qtwebkit
Cloning into '/var/lib/mock/f41-build-812281-147777/root/chroot_tmpdir/scmroot/qt5-qtwebkit'...
$ git fetch origin f230393a7d84c9ef6dff85e1a15c6278dfd85f5a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qt5-qtwebkit
 * [new ref]         f230393a7d84c9ef6dff85e1a15c6278dfd85f5a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f230393 Rebuild (qt5)