$ git clone -n https://src.fedoraproject.org/rpms/rust-yuvutils-rs.git /var/lib/mock/f45-build-46315-833/root/chroot_tmpdir/scmroot/rust-yuvutils-rs
Cloning into '/var/lib/mock/f45-build-46315-833/root/chroot_tmpdir/scmroot/rust-yuvutils-rs'...
$ git fetch origin a65c63cea6452fc6ab5e6b3b603e26d3709b0d51:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-yuvutils-rs
 * [new ref]         a65c63cea6452fc6ab5e6b3b603e26d3709b0d51 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a65c63c Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild