$ git clone -n https://src.fedoraproject.org/rpms/ghc-cryptonite.git /var/lib/mock/f39-build-1507710-35294/root/chroot_tmpdir/scmroot/ghc-cryptonite
Cloning into '/var/lib/mock/f39-build-1507710-35294/root/chroot_tmpdir/scmroot/ghc-cryptonite'...
$ git fetch origin 2fea2f35d2d5b2c6d7ff8b2f4b8286cc1159dba4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-cryptonite
 * [new ref]         2fea2f35d2d5b2c6d7ff8b2f4b8286cc1159dba4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2fea2f3 bump release