$ git clone -n https://src.fedoraproject.org/rpms/rust-system-deps.git /var/lib/mock/f45-build-45313-822/root/chroot_tmpdir/scmroot/rust-system-deps
Cloning into '/var/lib/mock/f45-build-45313-822/root/chroot_tmpdir/scmroot/rust-system-deps'...
$ git fetch origin c5ce27aa63edaba5b2fd762305140771ec5bbf4e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-system-deps
 * [new ref]         c5ce27aa63edaba5b2fd762305140771ec5bbf4e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c5ce27a Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild