$ git clone -n https://src.fedoraproject.org/rpms/rust-temptree.git /var/lib/mock/f39-build-1441932-32422/root/chroot_tmpdir/scmroot/rust-temptree
Cloning into '/var/lib/mock/f39-build-1441932-32422/root/chroot_tmpdir/scmroot/rust-temptree'...
$ git fetch origin 66231ff4ee827672eb59c6264fa923dfa3ac3816:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-temptree
 * [new ref]         66231ff4ee827672eb59c6264fa923dfa3ac3816 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 66231ff Regenerate with rust2rpm v24