$ git clone -n https://src.fedoraproject.org/rpms/fpc.git /var/lib/mock/f42-build-3401505-45130/root/chroot_tmpdir/scmroot/fpc
Cloning into '/var/lib/mock/f42-build-3401505-45130/root/chroot_tmpdir/scmroot/fpc'...
$ git fetch origin 4d4f309556f5be408441764da14ae4226a734d8a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/fpc
 * [new ref]         4d4f309556f5be408441764da14ae4226a734d8a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4d4f309 Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild