$ git clone -n https://src.fedoraproject.org/rpms/rust-gix-chunk.git /var/lib/mock/f40-build-2656293-66915/root/chroot_tmpdir/scmroot/rust-gix-chunk
Cloning into '/var/lib/mock/f40-build-2656293-66915/root/chroot_tmpdir/scmroot/rust-gix-chunk'...
$ git fetch origin 35486df74893c3796d6a6415a0f2dcfd69d0d018:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-gix-chunk
 * [new ref]         35486df74893c3796d6a6415a0f2dcfd69d0d018 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 35486df Update to version 0.4.7; Fixes RHBZ#2253231