$ git clone -n https://src.fedoraproject.org/rpms/fpc-srpm-macros.git /var/lib/mock/f42-build-3275454-41320/root/chroot_tmpdir/scmroot/fpc-srpm-macros
Cloning into '/var/lib/mock/f42-build-3275454-41320/root/chroot_tmpdir/scmroot/fpc-srpm-macros'...
$ git fetch origin e6d2b76076e5a1e12cc5ab597e6f1a49392956b5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/fpc-srpm-macros
 * [new ref]         e6d2b76076e5a1e12cc5ab597e6f1a49392956b5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e6d2b76 Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild