$ git clone -n https://src.fedoraproject.org/rpms/perl-Crypt-OpenSSL-Bignum.git /var/lib/mock/f41-build-815806-149783/root/chroot_tmpdir/scmroot/perl-Crypt-OpenSSL-Bignum
Cloning into '/var/lib/mock/f41-build-815806-149783/root/chroot_tmpdir/scmroot/perl-Crypt-OpenSSL-Bignum'...
$ git fetch origin 32d4acdf10ab78bdfea638962fa2fcd8f9a86807:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Crypt-OpenSSL-Bignum
 * [new ref]         32d4acdf10ab78bdfea638962fa2fcd8f9a86807 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 32d4acd Perl 5.40 rebuild