$ git clone -n https://src.fedoraproject.org/rpms/perl-Eval-Context.git /var/lib/mock/f45-build-23408-597/root/chroot_tmpdir/scmroot/perl-Eval-Context
Cloning into '/var/lib/mock/f45-build-23408-597/root/chroot_tmpdir/scmroot/perl-Eval-Context'...
$ git fetch origin 815146134e6073d8c79c3901d453025b488c5f13:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Eval-Context
 * [new ref]         815146134e6073d8c79c3901d453025b488c5f13 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8151461 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild