$ git clone -n https://src.fedoraproject.org/rpms/rust-string_cache_codegen0.5.git /var/lib/mock/f45-build-45218-821/root/chroot_tmpdir/scmroot/rust-string_cache_codegen0.5
Cloning into '/var/lib/mock/f45-build-45218-821/root/chroot_tmpdir/scmroot/rust-string_cache_codegen0.5'...
$ git fetch origin a91ae997ca0ed3754715de7d35767de012ec3f4a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-string_cache_codegen0.5
 * [new ref]         a91ae997ca0ed3754715de7d35767de012ec3f4a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a91ae99 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild