$ git clone -n https://src.fedoraproject.org/rpms/ghc-tagsoup.git /var/lib/mock/f41-build-838919-159873/root/chroot_tmpdir/scmroot/ghc-tagsoup
Cloning into '/var/lib/mock/f41-build-838919-159873/root/chroot_tmpdir/scmroot/ghc-tagsoup'...
$ git fetch origin f312363afaf1fe2bd2fba692c1efaca3f4870b9c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-tagsoup
 * [new ref]         f312363afaf1fe2bd2fba692c1efaca3f4870b9c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f312363 bump release