$ git clone -n https://src.fedoraproject.org/rpms/ghc-microlens-th.git /var/lib/mock/f45-build-10527-418/root/chroot_tmpdir/scmroot/ghc-microlens-th
Cloning into '/var/lib/mock/f45-build-10527-418/root/chroot_tmpdir/scmroot/ghc-microlens-th'...
$ git fetch origin d6a247993b3f07158d39070aea60b738772ffec2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-microlens-th
 * [new ref]         d6a247993b3f07158d39070aea60b738772ffec2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d6a2479 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild