$ git clone -n https://src.fedoraproject.org/rpms/qt5-qttools.git /var/lib/mock/f42-build-side-1-3537700-46560/root/chroot_tmpdir/scmroot/qt5-qttools
Cloning into '/var/lib/mock/f42-build-side-1-3537700-46560/root/chroot_tmpdir/scmroot/qt5-qttools'...
$ git fetch origin 53be503e484a42d21ae88bb54d5f2264a52071ae:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qt5-qttools
 * [new ref]         53be503e484a42d21ae88bb54d5f2264a52071ae -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 53be503 5.15.17