$ git clone -n https://src.fedoraproject.org/rpms/ghc-xml-types.git /var/lib/mock/f45-build-10982-425/root/chroot_tmpdir/scmroot/ghc-xml-types
Cloning into '/var/lib/mock/f45-build-10982-425/root/chroot_tmpdir/scmroot/ghc-xml-types'...
$ git fetch origin 86e5ab6c0b1d7203acd62f2896004b268177072e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-xml-types
 * [new ref]         86e5ab6c0b1d7203acd62f2896004b268177072e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 86e5ab6 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild