$ git clone -n https://src.fedoraproject.org/rpms/caja.git /var/lib/mock/f40-build-2587041-62471/root/chroot_tmpdir/scmroot/caja
Cloning into '/var/lib/mock/f40-build-2587041-62471/root/chroot_tmpdir/scmroot/caja'...
$ git fetch origin 59532130fea65164d41b92142c714ff3e0f6bad2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/caja
 * [new ref]         59532130fea65164d41b92142c714ff3e0f6bad2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5953213 update to 1.28.0