$ git clone -n https://src.fedoraproject.org/rpms/rust-hashbrown.git /var/lib/mock/f40-build-2169935-51008/root/chroot_tmpdir/scmroot/rust-hashbrown
Cloning into '/var/lib/mock/f40-build-2169935-51008/root/chroot_tmpdir/scmroot/rust-hashbrown'...
$ git fetch origin 36ec75d09889155bc7ca0aea0283ecd9ca2e905e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-hashbrown
 * [new ref]         36ec75d09889155bc7ca0aea0283ecd9ca2e905e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 36ec75d Update to version 0.14.3; Fixes RHBZ#2251546