$ git clone -n https://src.fedoraproject.org/rpms/rust-rust-embed.git /var/lib/mock/f45-build-44517-814/root/chroot_tmpdir/scmroot/rust-rust-embed
Cloning into '/var/lib/mock/f45-build-44517-814/root/chroot_tmpdir/scmroot/rust-rust-embed'...
$ git fetch origin c10a137f13bc68bdde9bcd1691f8eb6b38343bcd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-rust-embed
 * [new ref]         c10a137f13bc68bdde9bcd1691f8eb6b38343bcd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c10a137 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild