$ git clone -n https://src.fedoraproject.org/rpms/perl-Data-HexDump-XXD.git /var/lib/mock/f45-build-22832-594/root/chroot_tmpdir/scmroot/perl-Data-HexDump-XXD
Cloning into '/var/lib/mock/f45-build-22832-594/root/chroot_tmpdir/scmroot/perl-Data-HexDump-XXD'...
$ git fetch origin 6dfe49bfa83154a009d679f828b88eef75748162:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Data-HexDump-XXD
 * [new ref]         6dfe49bfa83154a009d679f828b88eef75748162 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6dfe49b Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild