$ git clone -n https://src.fedoraproject.org/rpms/rust-proc-macro-error-attr.git /var/lib/mock/f45-build-44026-809/root/chroot_tmpdir/scmroot/rust-proc-macro-error-attr
Cloning into '/var/lib/mock/f45-build-44026-809/root/chroot_tmpdir/scmroot/rust-proc-macro-error-attr'...
$ git fetch origin 4260e2a1d69ca5a22b3f5961b3096aab62df864c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-proc-macro-error-attr
 * [new ref]         4260e2a1d69ca5a22b3f5961b3096aab62df864c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4260e2a Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild