$ git clone -n https://src.fedoraproject.org/rpms/perl-Crypt-OpenSSL-PKCS10.git /var/lib/mock/f40-build-2239057-53593/root/chroot_tmpdir/scmroot/perl-Crypt-OpenSSL-PKCS10
Cloning into '/var/lib/mock/f40-build-2239057-53593/root/chroot_tmpdir/scmroot/perl-Crypt-OpenSSL-PKCS10'...
$ git fetch origin 9310b25bae858ab6234546d22306a4f111388588:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Crypt-OpenSSL-PKCS10
 * [new ref]         9310b25bae858ab6234546d22306a4f111388588 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9310b25 0.25 bump (rhbz#2231739)