$ git clone -n https://src.fedoraproject.org/rpms/passivetex.git /var/lib/mock/f45-build-21420-584/root/chroot_tmpdir/scmroot/passivetex
Cloning into '/var/lib/mock/f45-build-21420-584/root/chroot_tmpdir/scmroot/passivetex'...
$ git fetch origin 66b04d34373bfb8c7da27ecb4f6497a1ee6e856c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/passivetex
 * [new ref]         66b04d34373bfb8c7da27ecb4f6497a1ee6e856c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 66b04d3 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild