$ git clone -n https://src.fedoraproject.org/rpms/rust-gix-config.git /var/lib/mock/f40-build-1497109-23862/root/chroot_tmpdir/scmroot/rust-gix-config
Cloning into '/var/lib/mock/f40-build-1497109-23862/root/chroot_tmpdir/scmroot/rust-gix-config'...
$ git fetch origin 830789f7279f94a6235487e187f3c9dd4a35298a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-gix-config
 * [new ref]         830789f7279f94a6235487e187f3c9dd4a35298a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 830789f Update to version 0.37.0 (rhbz#2282445)