$ git clone -n https://src.fedoraproject.org/rpms/rust-serde_bytes.git /var/lib/mock/f45-build-44843-818/root/chroot_tmpdir/scmroot/rust-serde_bytes
Cloning into '/var/lib/mock/f45-build-44843-818/root/chroot_tmpdir/scmroot/rust-serde_bytes'...
$ git fetch origin dfb84edd7b021665a1f40478b98acf3d4f04838d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-serde_bytes
 * [new ref]         dfb84edd7b021665a1f40478b98acf3d4f04838d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dfb84ed Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild