$ git clone -n https://src.fedoraproject.org/rpms/perl-Crypt-OpenSSL-Guess.git /var/lib/mock/f45-build-22590-593/root/chroot_tmpdir/scmroot/perl-Crypt-OpenSSL-Guess
Cloning into '/var/lib/mock/f45-build-22590-593/root/chroot_tmpdir/scmroot/perl-Crypt-OpenSSL-Guess'...
$ git fetch origin 8ac004ab25600766b49a9e51e3a36f277acf3a73:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Crypt-OpenSSL-Guess
 * [new ref]         8ac004ab25600766b49a9e51e3a36f277acf3a73 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8ac004a Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild