$ git clone -n https://src.fedoraproject.org/rpms/qt5-qtquickcontrols.git /var/lib/mock/f42-build-side-1-3539529-46565/root/chroot_tmpdir/scmroot/qt5-qtquickcontrols
Cloning into '/var/lib/mock/f42-build-side-1-3539529-46565/root/chroot_tmpdir/scmroot/qt5-qtquickcontrols'...
$ git fetch origin de47346a667b78889f479a808bc05c1ad2fde0b6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qt5-qtquickcontrols
 * [new ref]         de47346a667b78889f479a808bc05c1ad2fde0b6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at de47346 5.15.17