$ git clone -n https://src.fedoraproject.org/rpms/perl-Crypt-SMIME.git /var/lib/mock/f45-build-22651-593/root/chroot_tmpdir/scmroot/perl-Crypt-SMIME
Cloning into '/var/lib/mock/f45-build-22651-593/root/chroot_tmpdir/scmroot/perl-Crypt-SMIME'...
$ git fetch origin 0dd64093c8c539433a2bc856cc0a81577d8789e1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Crypt-SMIME
 * [new ref]         0dd64093c8c539433a2bc856cc0a81577d8789e1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0dd6409 Update to v0.34