$ git clone -n https://src.fedoraproject.org/rpms/perl-Math-GMP.git /var/lib/mock/f40-build-778381-129886/root/chroot_tmpdir/scmroot/perl-Math-GMP
Cloning into '/var/lib/mock/f40-build-778381-129886/root/chroot_tmpdir/scmroot/perl-Math-GMP'...
$ git fetch origin 3bc6d00b4db3dd2b88d024ef9b9f6f23c292894f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Math-GMP
 * [new ref]         3bc6d00b4db3dd2b88d024ef9b9f6f23c292894f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3bc6d00 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild