$ git clone -n https://src.fedoraproject.org/rpms/mlt.git /var/lib/mock/f40-build-795640-140214/root/chroot_tmpdir/scmroot/mlt
Cloning into '/var/lib/mock/f40-build-795640-140214/root/chroot_tmpdir/scmroot/mlt'...
$ git fetch origin 9b4915e3657b45e5969ad9a08d5705bb05bea2cc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mlt
 * [new ref]         9b4915e3657b45e5969ad9a08d5705bb05bea2cc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9b4915e Workaround https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113205