$ git clone -n https://src.fedoraproject.org/rpms/qt5-qtmultimedia.git /var/lib/mock/f39-build-1706957-41221/root/chroot_tmpdir/scmroot/qt5-qtmultimedia
Cloning into '/var/lib/mock/f39-build-1706957-41221/root/chroot_tmpdir/scmroot/qt5-qtmultimedia'...
$ git fetch origin 68e68d9ff1bcb252ed5ed318ab45247f8af4eaf4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qt5-qtmultimedia
 * [new ref]         68e68d9ff1bcb252ed5ed318ab45247f8af4eaf4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 68e68d9 5.15.11