$ git clone -n https://src.fedoraproject.org/rpms/perl-Crypt-JWT.git /var/lib/mock/f45-build-22609-593/root/chroot_tmpdir/scmroot/perl-Crypt-JWT
Cloning into '/var/lib/mock/f45-build-22609-593/root/chroot_tmpdir/scmroot/perl-Crypt-JWT'...
$ git fetch origin dd834cd9efd030a6a78ce611108b1278b065b839:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Crypt-JWT
 * [new ref]         dd834cd9efd030a6a78ce611108b1278b065b839 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dd834cd Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild