$ git clone -n https://src.fedoraproject.org/rpms/qt6-qtwebchannel.git /var/lib/mock/f42-build-side-1-3568012-46742/root/chroot_tmpdir/scmroot/qt6-qtwebchannel
Cloning into '/var/lib/mock/f42-build-side-1-3568012-46742/root/chroot_tmpdir/scmroot/qt6-qtwebchannel'...
$ git fetch origin 6f6f82863f303187c3a687fcb229d824e3b4b2e0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qt6-qtwebchannel
 * [new ref]         6f6f82863f303187c3a687fcb229d824e3b4b2e0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6f6f828 6.9.1