$ git clone -n https://src.fedoraproject.org/rpms/rust-apple-nvram.git /var/lib/mock/f40-build-2034760-47913/root/chroot_tmpdir/scmroot/rust-apple-nvram
Cloning into '/var/lib/mock/f40-build-2034760-47913/root/chroot_tmpdir/scmroot/rust-apple-nvram'...
$ git fetch origin dc436a081d5091122942306a3c1fdf0803a1da7f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-apple-nvram
 * [new ref]         dc436a081d5091122942306a3c1fdf0803a1da7f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dc436a0 Update to 0.2.1; Fixes: RHBZ#2248001