$ git clone -n https://src.fedoraproject.org/rpms/rust-proc-macro-crate.git /var/lib/mock/f40-build-2063293-49167/root/chroot_tmpdir/scmroot/rust-proc-macro-crate
Cloning into '/var/lib/mock/f40-build-2063293-49167/root/chroot_tmpdir/scmroot/rust-proc-macro-crate'...
$ git fetch origin 65d4039af437c7a40dd11d44a8d5c032eda3eadf:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-proc-macro-crate
 * [new ref]         65d4039af437c7a40dd11d44a8d5c032eda3eadf -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 65d4039 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild