$ git clone -n https://src.fedoraproject.org/rpms/rust-parking.git /var/lib/mock/f39-build-1522193-35893/root/chroot_tmpdir/scmroot/rust-parking
Cloning into '/var/lib/mock/f39-build-1522193-35893/root/chroot_tmpdir/scmroot/rust-parking'...
$ git fetch origin 37a0875e306beb64cf61cca6fd380a9a3f42b80e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-parking
 * [new ref]         37a0875e306beb64cf61cca6fd380a9a3f42b80e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 37a0875 Update to version 2.2.0; Fixes RHBZ#2244745