$ git clone -n https://src.fedoraproject.org/rpms/rtfilter.git /var/lib/mock/f39-build-1457858-33020/root/chroot_tmpdir/scmroot/rtfilter
Cloning into '/var/lib/mock/f39-build-1457858-33020/root/chroot_tmpdir/scmroot/rtfilter'...
$ git fetch origin 4df831d99935a94a1d0bec4571775e97f6d533d9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rtfilter
 * [new ref]         4df831d99935a94a1d0bec4571775e97f6d533d9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4df831d feat: update to 1.3 (fixes rh#1795446)