$ git clone -n https://src.fedoraproject.org/rpms/binaryen.git /var/lib/mock/f41-build-853784-166734/root/chroot_tmpdir/scmroot/binaryen
Cloning into '/var/lib/mock/f41-build-853784-166734/root/chroot_tmpdir/scmroot/binaryen'...
$ git fetch origin 49ff61495dc3b6f82d0c08638572d40bb517846c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/binaryen
 * [new ref]         49ff61495dc3b6f82d0c08638572d40bb517846c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 49ff614 Merge branch 'f40' into rawhide