$ git clone -n https://src.fedoraproject.org/rpms/qt6ct.git /var/lib/mock/f45-build-34158-679/root/chroot_tmpdir/scmroot/qt6ct
Cloning into '/var/lib/mock/f45-build-34158-679/root/chroot_tmpdir/scmroot/qt6ct'...
$ git fetch origin 0e7d5c2be73984f8e3702e32b717296009a99df9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qt6ct
 * [new ref]         0e7d5c2be73984f8e3702e32b717296009a99df9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0e7d5c2 Rebuild (qt6)