$ git clone -n https://src.fedoraproject.org/rpms/perl-Math-GMP.git /var/lib/mock/f31-build-67050-29978/root/chroot_tmpdir/scmroot/perl-Math-GMP
Cloning into '/var/lib/mock/f31-build-67050-29978/root/chroot_tmpdir/scmroot/perl-Math-GMP'...
$ git reset --hard fb1541a98d2d14821c4fb4611674f0f1b8bb9b08
HEAD is now at fb1541a - Rebuilt for https://fedoraproject.org/wiki/Fedora_31_Mass_Rebuild