$ git clone -n https://src.fedoraproject.org/rpms/perl-Array-Unique.git /var/lib/mock/f45-build-21778-588/root/chroot_tmpdir/scmroot/perl-Array-Unique
Cloning into '/var/lib/mock/f45-build-21778-588/root/chroot_tmpdir/scmroot/perl-Array-Unique'...
$ git fetch origin e68717cb7f6936aa38bc027a6e293b9169f97159:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Array-Unique
 * [new ref]         e68717cb7f6936aa38bc027a6e293b9169f97159 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e68717c Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild