$ git clone -n https://src.fedoraproject.org/rpms/perl-AnyEvent-CacheDNS.git /var/lib/mock/f45-build-21657-587/root/chroot_tmpdir/scmroot/perl-AnyEvent-CacheDNS
Cloning into '/var/lib/mock/f45-build-21657-587/root/chroot_tmpdir/scmroot/perl-AnyEvent-CacheDNS'...
$ git fetch origin 5b422a191441b152ec2b8fe21dc81bdc2c75e911:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-AnyEvent-CacheDNS
 * [new ref]         5b422a191441b152ec2b8fe21dc81bdc2c75e911 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5b422a1 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild