$ git clone -n https://src.fedoraproject.org/rpms/rust-hyper.git /var/lib/mock/f45-build-42460-794/root/chroot_tmpdir/scmroot/rust-hyper
Cloning into '/var/lib/mock/f45-build-42460-794/root/chroot_tmpdir/scmroot/rust-hyper'...
$ git fetch origin 04b88fdc4d35b2bf8d77562684f1d0e152df7fb4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-hyper
 * [new ref]         04b88fdc4d35b2bf8d77562684f1d0e152df7fb4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 04b88fd Update to version 1.11.1; Fixes RHBZ#2525607