$ git clone -n https://src.fedoraproject.org/rpms/rust-jiter.git /var/lib/mock/f40-build-1612285-24071/root/chroot_tmpdir/scmroot/rust-jiter
Cloning into '/var/lib/mock/f40-build-1612285-24071/root/chroot_tmpdir/scmroot/rust-jiter'...
$ git fetch origin 1d273afe562056b58cc549e7cd6fa11aec837ef2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-jiter
 * [new ref]         1d273afe562056b58cc549e7cd6fa11aec837ef2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1d273af Update to 0.5.0 (close RHBZ#2294053)