$ git clone -n https://src.fedoraproject.org/rpms/kf6-kdeclarative.git /var/lib/mock/f40-build-788039-134983/root/chroot_tmpdir/scmroot/kf6-kdeclarative
Cloning into '/var/lib/mock/f40-build-788039-134983/root/chroot_tmpdir/scmroot/kf6-kdeclarative'...
$ git fetch origin 006f34edaa4ef447772d5ae3a1c0e2ee595be79d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf6-kdeclarative
 * [new ref]         006f34edaa4ef447772d5ae3a1c0e2ee595be79d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 006f34e 6.0.0