$ git clone -n https://src.fedoraproject.org/rpms/perl-Test-Base.git /var/lib/mock/f45-build-26557-618/root/chroot_tmpdir/scmroot/perl-Test-Base
Cloning into '/var/lib/mock/f45-build-26557-618/root/chroot_tmpdir/scmroot/perl-Test-Base'...
$ git fetch origin a03e5245f249d56f8825eaac684ee2620eb12d60:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Test-Base
 * [new ref]         a03e5245f249d56f8825eaac684ee2620eb12d60 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a03e524 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild