$ git clone -n https://src.fedoraproject.org/rpms/rust-anstream0.3.git /var/lib/mock/f40-build-2061024-49167/root/chroot_tmpdir/scmroot/rust-anstream0.3
Cloning into '/var/lib/mock/f40-build-2061024-49167/root/chroot_tmpdir/scmroot/rust-anstream0.3'...
$ git fetch origin da4513345a07d9dd498188ad50248ad591f4dcf7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-anstream0.3
 * [new ref]         da4513345a07d9dd498188ad50248ad591f4dcf7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at da45133 Initial import (anstream 0.3 compat package)