$ git clone -n https://src.fedoraproject.org/rpms/perl-Crypt-OpenSSL-ECDSA.git /var/lib/mock/f45-build-22584-593/root/chroot_tmpdir/scmroot/perl-Crypt-OpenSSL-ECDSA
Cloning into '/var/lib/mock/f45-build-22584-593/root/chroot_tmpdir/scmroot/perl-Crypt-OpenSSL-ECDSA'...
$ git fetch origin 1a258b140884f16b594606f81b01a7cb34772f71:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Crypt-OpenSSL-ECDSA
 * [new ref]         1a258b140884f16b594606f81b01a7cb34772f71 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1a258b1 Perl 5.44 rebuild