$ git clone -n https://src.fedoraproject.org/rpms/rust-zvariant_derive4.git /var/lib/mock/f45-build-46412-834/root/chroot_tmpdir/scmroot/rust-zvariant_derive4
Cloning into '/var/lib/mock/f45-build-46412-834/root/chroot_tmpdir/scmroot/rust-zvariant_derive4'...
$ git fetch origin 94aed827045b2a6893b25a958999ce21a8b6dd56:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-zvariant_derive4
 * [new ref]         94aed827045b2a6893b25a958999ce21a8b6dd56 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 94aed82 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild