$ git clone -n https://src.fedoraproject.org/rpms/kf6-kfilemetadata.git /var/lib/mock/f42-build-side-1-3503854-45982/root/chroot_tmpdir/scmroot/kf6-kfilemetadata
Cloning into '/var/lib/mock/f42-build-side-1-3503854-45982/root/chroot_tmpdir/scmroot/kf6-kfilemetadata'...
$ git fetch origin 236da6ff9fbe60f47bb3d153c90a057da418b05e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf6-kfilemetadata
 * [new ref]         236da6ff9fbe60f47bb3d153c90a057da418b05e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 236da6f 6.13.0