$ git clone -n https://src.fedoraproject.org/rpms/ghc-crypton.git /var/lib/mock/f45-build-10193-414/root/chroot_tmpdir/scmroot/ghc-crypton
Cloning into '/var/lib/mock/f45-build-10193-414/root/chroot_tmpdir/scmroot/ghc-crypton'...
$ git fetch origin 6155dc547fc5bc9c36979a66db32a8832a915259:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-crypton
 * [new ref]         6155dc547fc5bc9c36979a66db32a8832a915259 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6155dc5 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild