$ git clone -n https://src.fedoraproject.org/rpms/rust-hexyl.git /var/lib/mock/f40-build-739441-108998/root/chroot_tmpdir/scmroot/rust-hexyl
Cloning into '/var/lib/mock/f40-build-739441-108998/root/chroot_tmpdir/scmroot/rust-hexyl'...
$ git fetch origin 21ec516e49556e47903fcc1e1057bd2e6f96ee79:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-hexyl
 * [new ref]         21ec516e49556e47903fcc1e1057bd2e6f96ee79 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 21ec516 Update to version 0.13.1; Fixes RHBZ#2226666