$ git clone -n https://src.fedoraproject.org/rpms/rust-jsonc-parser.git /var/lib/mock/f45-build-42736-796/root/chroot_tmpdir/scmroot/rust-jsonc-parser
Cloning into '/var/lib/mock/f45-build-42736-796/root/chroot_tmpdir/scmroot/rust-jsonc-parser'...
$ git fetch origin 64cd87fe6ade3f74468ce2ad840252759ffcefd1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-jsonc-parser
 * [new ref]         64cd87fe6ade3f74468ce2ad840252759ffcefd1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 64cd87f Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild