$ git clone -n https://src.fedoraproject.org/rpms/ghc-base-compat.git /var/lib/mock/f41-build-835780-158643/root/chroot_tmpdir/scmroot/ghc-base-compat
Cloning into '/var/lib/mock/f41-build-835780-158643/root/chroot_tmpdir/scmroot/ghc-base-compat'...
$ git fetch origin 766e726093056ff2eb3dea880cb8c87370fc7b65:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-base-compat
 * [new ref]         766e726093056ff2eb3dea880cb8c87370fc7b65 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 766e726 https://hackage.haskell.org/package/base-compat-0.13.1/changelog