$ git clone -n https://src.fedoraproject.org/rpms/perl-Devel-StackTrace-WithLexicals.git /var/lib/mock/f45-build-23160-596/root/chroot_tmpdir/scmroot/perl-Devel-StackTrace-WithLexicals
Cloning into '/var/lib/mock/f45-build-23160-596/root/chroot_tmpdir/scmroot/perl-Devel-StackTrace-WithLexicals'...
$ git fetch origin 77afddf30d3101cb947b584fcfd6c943ae547e58:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Devel-StackTrace-WithLexicals
 * [new ref]         77afddf30d3101cb947b584fcfd6c943ae547e58 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 77afddf Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild