$ git clone -n https://src.fedoraproject.org/rpms/perl-Task-Weaken.git /var/lib/mock/f45-build-26493-617/root/chroot_tmpdir/scmroot/perl-Task-Weaken
Cloning into '/var/lib/mock/f45-build-26493-617/root/chroot_tmpdir/scmroot/perl-Task-Weaken'...
$ git fetch origin dc8a8da06b08de0da6013d9a636d8418481a4b65:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Task-Weaken
 * [new ref]         dc8a8da06b08de0da6013d9a636d8418481a4b65 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dc8a8da Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild