$ git clone -n https://src.fedoraproject.org/rpms/qt5-qtwebkit.git /var/lib/mock/f41-build-847239-163861/root/chroot_tmpdir/scmroot/qt5-qtwebkit
Cloning into '/var/lib/mock/f41-build-847239-163861/root/chroot_tmpdir/scmroot/qt5-qtwebkit'...
$ git fetch origin acbc3ea3183c446bbd1dc0bfd36eb060714514e5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qt5-qtwebkit
 * [new ref]         acbc3ea3183c446bbd1dc0bfd36eb060714514e5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at acbc3ea Rebuild (qt5)