$ git clone -n https://src.fedoraproject.org/rpms/rust-h2.git /var/lib/mock/f40-build-2641604-66431/root/chroot_tmpdir/scmroot/rust-h2
Cloning into '/var/lib/mock/f40-build-2641604-66431/root/chroot_tmpdir/scmroot/rust-h2'...
$ git fetch origin 729e86ae66dbd41acff3193ecf2d771b208144ef:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-h2
 * [new ref]         729e86ae66dbd41acff3193ecf2d771b208144ef -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 729e86a Update to version 0.3.25