$ git clone -n https://src.fedoraproject.org/rpms/perl-Devel-Trace.git /var/lib/mock/f45-build-23155-596/root/chroot_tmpdir/scmroot/perl-Devel-Trace
Cloning into '/var/lib/mock/f45-build-23155-596/root/chroot_tmpdir/scmroot/perl-Devel-Trace'...
$ git fetch origin 745cef7dd3b432e9dea941f188dcd575fb0367a7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Devel-Trace
 * [new ref]         745cef7dd3b432e9dea941f188dcd575fb0367a7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 745cef7 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild