$ git clone -n https://src.fedoraproject.org/rpms/qt6-qtwebchannel.git /var/lib/mock/f40-build-740317-109638/root/chroot_tmpdir/scmroot/qt6-qtwebchannel
Cloning into '/var/lib/mock/f40-build-740317-109638/root/chroot_tmpdir/scmroot/qt6-qtwebchannel'...
$ git fetch origin 7bb78e9d68c0a2992b12f0a38f6e25960123b5bf:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qt6-qtwebchannel
 * [new ref]         7bb78e9d68c0a2992b12f0a38f6e25960123b5bf -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7bb78e9 6.6.0