$ git clone -n https://src.fedoraproject.org/rpms/rust-cfg_aliases.git /var/lib/mock/f38-build-side-43-rust-devel-1416794-31457/root/chroot_tmpdir/scmroot/rust-cfg_aliases
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1416794-31457/root/chroot_tmpdir/scmroot/rust-cfg_aliases'...
$ git fetch origin 30f1506785cc4942e4b25886984024ddd7b87905:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-cfg_aliases
 * [new ref]         30f1506785cc4942e4b25886984024ddd7b87905 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 30f1506 Initial import (rhbz#2183859)