$ git clone -n https://src.fedoraproject.org/rpms/perl-srpm-macros.git /var/lib/mock/f40-build-2308371-57293/root/chroot_tmpdir/scmroot/perl-srpm-macros
Cloning into '/var/lib/mock/f40-build-2308371-57293/root/chroot_tmpdir/scmroot/perl-srpm-macros'...
$ git fetch origin 086dbd8288edf3d325ba4990144f4343bc86ddca:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-srpm-macros
 * [new ref]         086dbd8288edf3d325ba4990144f4343bc86ddca -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 086dbd8 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild