$ git clone -n https://src.fedoraproject.org/rpms/perl-Crypt-OpenSSL-Bignum.git /var/lib/mock/f40-build-731775-104580/root/chroot_tmpdir/scmroot/perl-Crypt-OpenSSL-Bignum
Cloning into '/var/lib/mock/f40-build-731775-104580/root/chroot_tmpdir/scmroot/perl-Crypt-OpenSSL-Bignum'...
$ git fetch origin f87f1dab6966209ff5fc9de232f923748071cf4a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Crypt-OpenSSL-Bignum
 * [new ref]         f87f1dab6966209ff5fc9de232f923748071cf4a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f87f1da Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild