$ git clone -n https://src.fedoraproject.org/rpms/rust-winnow.git /var/lib/mock/f40-build-704284-12987/root/chroot_tmpdir/scmroot/rust-winnow
Cloning into '/var/lib/mock/f40-build-704284-12987/root/chroot_tmpdir/scmroot/rust-winnow'...
$ git fetch origin 70cffc44d3095f367ddd687e8998608a755a0bab:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-winnow
 * [new ref]         70cffc44d3095f367ddd687e8998608a755a0bab -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 70cffc4 Update to version 0.6.8; Fixes RHBZ#2277380