$ git clone -n https://src.fedoraproject.org/rpms/rust-proc-macro-error-attr2.git /var/lib/mock/f45-build-44024-809/root/chroot_tmpdir/scmroot/rust-proc-macro-error-attr2
Cloning into '/var/lib/mock/f45-build-44024-809/root/chroot_tmpdir/scmroot/rust-proc-macro-error-attr2'...
$ git fetch origin aa5c3655a45e7e1936944d2a0795164a696cf3e4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-proc-macro-error-attr2
 * [new ref]         aa5c3655a45e7e1936944d2a0795164a696cf3e4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at aa5c365 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild