$ git clone -n https://src.fedoraproject.org/rpms/rust-serde_with.git /var/lib/mock/f38-build-side-43-rust-devel-1397657-31053/root/chroot_tmpdir/scmroot/rust-serde_with
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1397657-31053/root/chroot_tmpdir/scmroot/rust-serde_with'...
$ git fetch origin e818253683d0277d1257f38331dfae99bcd148a8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-serde_with
 * [new ref]         e818253683d0277d1257f38331dfae99bcd148a8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e818253 Update to version 1.14.0