$ git clone -n https://src.fedoraproject.org/rpms/jdupes.git /var/lib/mock/f40-build-2199503-51747/root/chroot_tmpdir/scmroot/jdupes
Cloning into '/var/lib/mock/f40-build-2199503-51747/root/chroot_tmpdir/scmroot/jdupes'...
$ git fetch origin dc4c78e064c738d68d1738f9be87e43dbb9d69d4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/jdupes
 * [new ref]         dc4c78e064c738d68d1738f9be87e43dbb9d69d4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dc4c78e Upgrade to jdupes-1.27.3