$ git clone -n https://src.fedoraproject.org/rpms/fcitx5-libthai.git /var/lib/mock/f39-build-1582131-38104/root/chroot_tmpdir/scmroot/fcitx5-libthai
Cloning into '/var/lib/mock/f39-build-1582131-38104/root/chroot_tmpdir/scmroot/fcitx5-libthai'...
$ git fetch origin 13b9136b5c060fba4accb6b47da18997702ba142:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/fcitx5-libthai
 * [new ref]         13b9136b5c060fba4accb6b47da18997702ba142 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 13b9136 update to upstream release 5.1.1