$ git clone -n https://src.fedoraproject.org/rpms/plasma-oxygen.git /var/lib/mock/f38-build-side-42-init-devel-839607-28409/root/chroot_tmpdir/scmroot/plasma-oxygen
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-839607-28409/root/chroot_tmpdir/scmroot/plasma-oxygen'...
$ git fetch origin 35e9d3b28465f524dcf78644ec9e7213467ce46a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/plasma-oxygen
 * [new ref]         35e9d3b28465f524dcf78644ec9e7213467ce46a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 35e9d3b 5.27.4