$ git clone -n https://src.fedoraproject.org/rpms/perl-Test-utf8.git /var/lib/mock/f45-build-26934-620/root/chroot_tmpdir/scmroot/perl-Test-utf8
Cloning into '/var/lib/mock/f45-build-26934-620/root/chroot_tmpdir/scmroot/perl-Test-utf8'...
$ git fetch origin 4f0ec93d83a4547591d6bae49aa1ee32f36fa92d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Test-utf8
 * [new ref]         4f0ec93d83a4547591d6bae49aa1ee32f36fa92d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4f0ec93 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild