$ git clone -n https://src.fedoraproject.org/rpms/rust-fearless_simd.git /var/lib/mock/f45-build-41602-784/root/chroot_tmpdir/scmroot/rust-fearless_simd
Cloning into '/var/lib/mock/f45-build-41602-784/root/chroot_tmpdir/scmroot/rust-fearless_simd'...
$ git fetch origin 6a1e40ad24b72d83eb0e739143eb589e762148d4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-fearless_simd
 * [new ref]         6a1e40ad24b72d83eb0e739143eb589e762148d4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6a1e40a Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild