$ git clone -n https://src.fedoraproject.org/rpms/rust-zram-generator.git /var/lib/mock/f40-build-2619680-64614/root/chroot_tmpdir/scmroot/rust-zram-generator
Cloning into '/var/lib/mock/f40-build-2619680-64614/root/chroot_tmpdir/scmroot/rust-zram-generator'...
$ git fetch origin ae22c4001a1ef21ce0526618b32868e8aebe0124:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-zram-generator
 * [new ref]         ae22c4001a1ef21ce0526618b32868e8aebe0124 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ae22c40 Update Rust macro usage