$ git clone -n https://src.fedoraproject.org/rpms/rust-macro_rules_attribute-proc_macro.git /var/lib/mock/f45-build-43104-800/root/chroot_tmpdir/scmroot/rust-macro_rules_attribute-proc_macro
Cloning into '/var/lib/mock/f45-build-43104-800/root/chroot_tmpdir/scmroot/rust-macro_rules_attribute-proc_macro'...
$ git fetch origin 42f2d9e704d9b28dcc59da10723228f422a32cb2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-macro_rules_attribute-proc_macro
 * [new ref]         42f2d9e704d9b28dcc59da10723228f422a32cb2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 42f2d9e Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild