$ git clone -n https://src.fedoraproject.org/rpms/hugin.git /var/lib/mock/f39-build-1639833-40127/root/chroot_tmpdir/scmroot/hugin
Cloning into '/var/lib/mock/f39-build-1639833-40127/root/chroot_tmpdir/scmroot/hugin'...
$ git fetch origin 9f8680f8680ca25d04aaf08154da06f4ad48a51c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/hugin
 * [new ref]         9f8680f8680ca25d04aaf08154da06f4ad48a51c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9f8680f upstream stable release