$ git clone -n https://src.fedoraproject.org/rpms/rust-zbus.git /var/lib/mock/f40-build-2556580-62042/root/chroot_tmpdir/scmroot/rust-zbus
Cloning into '/var/lib/mock/f40-build-2556580-62042/root/chroot_tmpdir/scmroot/rust-zbus'...
$ git fetch origin 52a8803d4fb5379dd4acf39052dbf0814afcb8cd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-zbus
 * [new ref]         52a8803d4fb5379dd4acf39052dbf0814afcb8cd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 52a8803 Require nix's user feature