$ git clone -n https://src.fedoraproject.org/rpms/qt5-qt3d.git /var/lib/mock/f42-build-side-1-3539438-46565/root/chroot_tmpdir/scmroot/qt5-qt3d
Cloning into '/var/lib/mock/f42-build-side-1-3539438-46565/root/chroot_tmpdir/scmroot/qt5-qt3d'...
$ git fetch origin 7735d796ee27ad87edec9b5919f171d6dd7bb238:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qt5-qt3d
 * [new ref]         7735d796ee27ad87edec9b5919f171d6dd7bb238 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7735d79 5.15.17