$ git clone -n https://src.fedoraproject.org/rpms/rust-peg.git /var/lib/mock/f39-build-2259026-54360/root/chroot_tmpdir/scmroot/rust-peg
Cloning into '/var/lib/mock/f39-build-2259026-54360/root/chroot_tmpdir/scmroot/rust-peg'...
$ git fetch origin e333fa3754c704261d94f8589ed1f46c3e39f1e5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-peg
 * [new ref]         e333fa3754c704261d94f8589ed1f46c3e39f1e5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e333fa3 Update to version 0.8.2; Fixes RHBZ#2243159