$ git clone -n https://src.fedoraproject.org/rpms/perl-Crypt-X509.git /var/lib/mock/f45-build-22684-593/root/chroot_tmpdir/scmroot/perl-Crypt-X509
Cloning into '/var/lib/mock/f45-build-22684-593/root/chroot_tmpdir/scmroot/perl-Crypt-X509'...
$ git fetch origin 10f94b86eb1cd3bcc373291df2216084d924b759:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Crypt-X509
 * [new ref]         10f94b86eb1cd3bcc373291df2216084d924b759 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 10f94b8 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild