$ git clone -n https://src.fedoraproject.org/rpms/fuse-emulator.git /var/lib/mock/f40-build-801745-143854/root/chroot_tmpdir/scmroot/fuse-emulator
Cloning into '/var/lib/mock/f40-build-801745-143854/root/chroot_tmpdir/scmroot/fuse-emulator'...
$ git fetch origin 39b37ac7740615d7ca445cb5802b3b04ea4dac0f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/fuse-emulator
 * [new ref]         39b37ac7740615d7ca445cb5802b3b04ea4dac0f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 39b37ac Use GTK3 and SDL2 rather than GTK2 and SDL1 (rhbz#2000729)