$ git clone -n https://src.fedoraproject.org/rpms/ghc-cryptohash-sha256.git /var/lib/mock/f38-build-side-42-init-devel-623482-26363/root/chroot_tmpdir/scmroot/ghc-cryptohash-sha256
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-623482-26363/root/chroot_tmpdir/scmroot/ghc-cryptohash-sha256'...
$ git fetch origin 93c31e86f1c3f2d9ea806c1343b7839bf1cd587b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-cryptohash-sha256
 * [new ref]         93c31e86f1c3f2d9ea806c1343b7839bf1cd587b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 93c31e8 Convert to %autorelease and %autochangelog