$ git clone -n https://src.fedoraproject.org/rpms/rust-gix-packetline.git /var/lib/mock/f41-build-side-1-2923835-34983/root/chroot_tmpdir/scmroot/rust-gix-packetline
Cloning into '/var/lib/mock/f41-build-side-1-2923835-34983/root/chroot_tmpdir/scmroot/rust-gix-packetline'...
$ git fetch origin b9b01d7de83cce5dad61beececc2a64e7c64490a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-gix-packetline
 * [new ref]         b9b01d7de83cce5dad61beececc2a64e7c64490a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b9b01d7 Update to version 0.17.6 (rhbz#2307391)