$ git clone -n https://src.fedoraproject.org/rpms/perl-Math-BigInt-GMP.git /var/lib/mock/f40-build-2305847-57113/root/chroot_tmpdir/scmroot/perl-Math-BigInt-GMP
Cloning into '/var/lib/mock/f40-build-2305847-57113/root/chroot_tmpdir/scmroot/perl-Math-BigInt-GMP'...
$ git fetch origin 334677d0d33cfa79a93906cab81564b1e077a0c3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Math-BigInt-GMP
 * [new ref]         334677d0d33cfa79a93906cab81564b1e077a0c3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 334677d Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild