$ git clone -n https://src.fedoraproject.org/rpms/rust-itertools0.10.git /var/lib/mock/f38-build-side-43-rust-devel-1413895-31445/root/chroot_tmpdir/scmroot/rust-itertools0.10
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1413895-31445/root/chroot_tmpdir/scmroot/rust-itertools0.10'...
$ git fetch origin 120697ba846e9f693c248713d9d281eea41501a8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-itertools0.10
 * [new ref]         120697ba846e9f693c248713d9d281eea41501a8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 120697b Initial import (itertools 0.10 compat package)