$ git clone -n https://src.fedoraproject.org/rpms/ghc-serialise.git /var/lib/mock/f45-build-10744-424/root/chroot_tmpdir/scmroot/ghc-serialise
Cloning into '/var/lib/mock/f45-build-10744-424/root/chroot_tmpdir/scmroot/ghc-serialise'...
$ git fetch origin 5776df8e394162fdc2338faff42f49ea2519b34d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-serialise
 * [new ref]         5776df8e394162fdc2338faff42f49ea2519b34d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5776df8 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild