$ git clone -n https://src.fedoraproject.org/rpms/qt5-qtmultimedia.git /var/lib/mock/f41-build-847174-163786/root/chroot_tmpdir/scmroot/qt5-qtmultimedia
Cloning into '/var/lib/mock/f41-build-847174-163786/root/chroot_tmpdir/scmroot/qt5-qtmultimedia'...
$ git fetch origin b3beed282d8a10859d15a5503b27c45aa60f4c2d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qt5-qtmultimedia
 * [new ref]         b3beed282d8a10859d15a5503b27c45aa60f4c2d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b3beed2 5.15.15