$ git clone -n https://src.fedoraproject.org/rpms/fuse-btfs.git /var/lib/mock/f41-build-842435-161603/root/chroot_tmpdir/scmroot/fuse-btfs
Cloning into '/var/lib/mock/f41-build-842435-161603/root/chroot_tmpdir/scmroot/fuse-btfs'...
$ git fetch origin 7ea470f586a34eb6e5fb7575d97c23a2a58cb255:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/fuse-btfs
 * [new ref]         7ea470f586a34eb6e5fb7575d97c23a2a58cb255 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7ea470f OPENSSL_NO_ENGINE deprecation workaround rhbz#2300679