$ git clone -n https://src.fedoraproject.org/rpms/rust-indexmap.git /var/lib/mock/f45-build-42543-794/root/chroot_tmpdir/scmroot/rust-indexmap
Cloning into '/var/lib/mock/f45-build-42543-794/root/chroot_tmpdir/scmroot/rust-indexmap'...
$ git fetch origin 6cea52866bc2d10175174be8de1816c185a75e78:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-indexmap
 * [new ref]         6cea52866bc2d10175174be8de1816c185a75e78 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6cea528 Update to version 2.14.2; Fixes RHBZ#2528982