$ git clone -n https://src.fedoraproject.org/rpms/rust-serde_spanned.git /var/lib/mock/f45-build-44850-818/root/chroot_tmpdir/scmroot/rust-serde_spanned
Cloning into '/var/lib/mock/f45-build-44850-818/root/chroot_tmpdir/scmroot/rust-serde_spanned'...
$ git fetch origin e013ccea411c767586b3d92054dc4e5534f02a16:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-serde_spanned
 * [new ref]         e013ccea411c767586b3d92054dc4e5534f02a16 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e013cce Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild