$ git clone -n https://src.fedoraproject.org/rpms/rust-pq-sys.git /var/lib/mock/f39-build-1494257-34542/root/chroot_tmpdir/scmroot/rust-pq-sys
Cloning into '/var/lib/mock/f39-build-1494257-34542/root/chroot_tmpdir/scmroot/rust-pq-sys'...
$ git fetch origin e18876647da357b0a6e0b6ee966f02a15979e8b2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-pq-sys
 * [new ref]         e18876647da357b0a6e0b6ee966f02a15979e8b2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e188766 Update to version 0.4.8; Fixes RHBZ#2187760