$ git clone -n https://src.fedoraproject.org/rpms/perl-Regexp-Common-net-CIDR.git /var/lib/mock/f45-build-25995-614/root/chroot_tmpdir/scmroot/perl-Regexp-Common-net-CIDR
Cloning into '/var/lib/mock/f45-build-25995-614/root/chroot_tmpdir/scmroot/perl-Regexp-Common-net-CIDR'...
$ git fetch origin fe8cb1923c07a7ee4451250c6decf0f2c3cfc870:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Regexp-Common-net-CIDR
 * [new ref]         fe8cb1923c07a7ee4451250c6decf0f2c3cfc870 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fe8cb19 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild