$ git clone -n https://src.fedoraproject.org/rpms/rust-proc-macro-crate.git /var/lib/mock/f41-build-side-1-3000405-36333/root/chroot_tmpdir/scmroot/rust-proc-macro-crate
Cloning into '/var/lib/mock/f41-build-side-1-3000405-36333/root/chroot_tmpdir/scmroot/rust-proc-macro-crate'...
$ git fetch origin 07cc71c2b6d93c422d101db338caefd64fb95295:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-proc-macro-crate
 * [new ref]         07cc71c2b6d93c422d101db338caefd64fb95295 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 07cc71c Update to version 3.2.0; Fixes RHBZ#2308108