$ git clone -n https://src.fedoraproject.org/rpms/ghc-integer-logarithms.git /var/lib/mock/f40-build-1998046-44203/root/chroot_tmpdir/scmroot/ghc-integer-logarithms
Cloning into '/var/lib/mock/f40-build-1998046-44203/root/chroot_tmpdir/scmroot/ghc-integer-logarithms'...
$ git fetch origin c2b56728fb2c68f6ebc9038a3e6d827f47366392:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-integer-logarithms
 * [new ref]         c2b56728fb2c68f6ebc9038a3e6d827f47366392 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c2b5672 bump release