$ git clone -n https://src.fedoraproject.org/rpms/kf6-purpose.git /var/lib/mock/f41-build-860299-168900/root/chroot_tmpdir/scmroot/kf6-purpose
Cloning into '/var/lib/mock/f41-build-860299-168900/root/chroot_tmpdir/scmroot/kf6-purpose'...
$ git fetch origin cd0c1750b97ca2c9362e6addc3ae2dd333e619b3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf6-purpose
 * [new ref]         cd0c1750b97ca2c9362e6addc3ae2dd333e619b3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cd0c175 6.7.0