$ git clone -n https://src.fedoraproject.org/rpms/rust-afterburn.git /var/lib/mock/f40-build-2688532-68099/root/chroot_tmpdir/scmroot/rust-afterburn
Cloning into '/var/lib/mock/f40-build-2688532-68099/root/chroot_tmpdir/scmroot/rust-afterburn'...
$ git fetch origin 337a2bcc00f5717dae1dcb422f0ad6b2da09c6c8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-afterburn
 * [new ref]         337a2bcc00f5717dae1dcb422f0ad6b2da09c6c8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 337a2bc Update Rust macro usage