$ git clone -n https://src.fedoraproject.org/rpms/psfex.git /var/lib/mock/f45-build-28985-634/root/chroot_tmpdir/scmroot/psfex
Cloning into '/var/lib/mock/f45-build-28985-634/root/chroot_tmpdir/scmroot/psfex'...
$ git fetch origin 42f3c4a8279e601600c0f629fd8cd57a6bcecee0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/psfex
 * [new ref]         42f3c4a8279e601600c0f629fd8cd57a6bcecee0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 42f3c4a Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild