$ git clone -n https://src.fedoraproject.org/rpms/ghc-lazysmallcheck.git /var/lib/mock/f40-build-742199-110610/root/chroot_tmpdir/scmroot/ghc-lazysmallcheck
Cloning into '/var/lib/mock/f40-build-742199-110610/root/chroot_tmpdir/scmroot/ghc-lazysmallcheck'...
$ git fetch origin 6a32b19d4b8ba1b41f4356a42290f14519681cf4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-lazysmallcheck
 * [new ref]         6a32b19d4b8ba1b41f4356a42290f14519681cf4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6a32b19 bump release