$ git clone -n https://src.fedoraproject.org/rpms/tlx.git /var/lib/mock/f38-build-side-42-init-devel-817413-28339/root/chroot_tmpdir/scmroot/tlx
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-817413-28339/root/chroot_tmpdir/scmroot/tlx'...
$ git fetch origin 7e0d4e0d6ad998885b8bf086fa90fff04662bab1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/tlx
 * [new ref]         7e0d4e0d6ad998885b8bf086fa90fff04662bab1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7e0d4e0 Add cstdint patch to fix FTBFS.