$ git clone -n https://src.fedoraproject.org/rpms/rust-lru.git /var/lib/mock/f41-build-side-1-3134851-39763/root/chroot_tmpdir/scmroot/rust-lru
Cloning into '/var/lib/mock/f41-build-side-1-3134851-39763/root/chroot_tmpdir/scmroot/rust-lru'...
$ git fetch origin 453ec0b5fa9e2b47822af52eb8cf97b8967f2244:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-lru
 * [new ref]         453ec0b5fa9e2b47822af52eb8cf97b8967f2244 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 453ec0b Update to version 0.12.5; Fixes RHBZ#2316997