$ git clone -n https://src.fedoraproject.org/rpms/ghc-safe-exceptions.git /var/lib/mock/f41-build-837787-159384/root/chroot_tmpdir/scmroot/ghc-safe-exceptions
Cloning into '/var/lib/mock/f41-build-837787-159384/root/chroot_tmpdir/scmroot/ghc-safe-exceptions'...
$ git fetch origin 41a0aed5b5903e6db4ba124606be6dc59d657400:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-safe-exceptions
 * [new ref]         41a0aed5b5903e6db4ba124606be6dc59d657400 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 41a0aed bump over tar-conduit