$ git clone -n https://src.fedoraproject.org/rpms/perl-X11-Protocol.git /var/lib/mock/f45-build-27417-624/root/chroot_tmpdir/scmroot/perl-X11-Protocol
Cloning into '/var/lib/mock/f45-build-27417-624/root/chroot_tmpdir/scmroot/perl-X11-Protocol'...
$ git fetch origin e3767a17dcf0428a244e5ea9ebab209f21181e20:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-X11-Protocol
 * [new ref]         e3767a17dcf0428a244e5ea9ebab209f21181e20 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e3767a1 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild