$ git clone -n https://src.fedoraproject.org/rpms/rust-drain.git /var/lib/mock/f40-build-2092035-50258/root/chroot_tmpdir/scmroot/rust-drain
Cloning into '/var/lib/mock/f40-build-2092035-50258/root/chroot_tmpdir/scmroot/rust-drain'...
$ git fetch origin 01b5836911a713ffa466f54cc974b647e95078fc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-drain
 * [new ref]         01b5836911a713ffa466f54cc974b647e95078fc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 01b5836 Initial import (#2245236)