$ git clone -n https://src.fedoraproject.org/rpms/ghc-tagsoup.git /var/lib/mock/f45-build-10820-424/root/chroot_tmpdir/scmroot/ghc-tagsoup
Cloning into '/var/lib/mock/f45-build-10820-424/root/chroot_tmpdir/scmroot/ghc-tagsoup'...
$ git fetch origin 55b375ffe20dea5c8dcc6d2c59151bad5b434f4f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-tagsoup
 * [new ref]         55b375ffe20dea5c8dcc6d2c59151bad5b434f4f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 55b375f Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild