$ git clone -n https://src.fedoraproject.org/rpms/qt5-qtmultimedia.git /var/lib/mock/f39-build-2229090-53125/root/chroot_tmpdir/scmroot/qt5-qtmultimedia
Cloning into '/var/lib/mock/f39-build-2229090-53125/root/chroot_tmpdir/scmroot/qt5-qtmultimedia'...
$ git fetch origin 2b9665734422293fa13d228c798b472f74ade6fa:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qt5-qtmultimedia
 * [new ref]         2b9665734422293fa13d228c798b472f74ade6fa -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2b96657 5.15.12