$ git clone -n https://src.fedoraproject.org/rpms/ec2-hibinit-agent.git /var/lib/mock/f45-build-7921-371/root/chroot_tmpdir/scmroot/ec2-hibinit-agent
Cloning into '/var/lib/mock/f45-build-7921-371/root/chroot_tmpdir/scmroot/ec2-hibinit-agent'...
$ git fetch origin cc780d207a5d498d28fd2b12e37623ff50d1743f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ec2-hibinit-agent
 * [new ref]         cc780d207a5d498d28fd2b12e37623ff50d1743f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cc780d2 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild