$ git clone -n https://src.fedoraproject.org/rpms/perl-Pod-Readme.git /var/lib/mock/f45-build-25868-613/root/chroot_tmpdir/scmroot/perl-Pod-Readme
Cloning into '/var/lib/mock/f45-build-25868-613/root/chroot_tmpdir/scmroot/perl-Pod-Readme'...
$ git fetch origin 1763f719d909eb2e85798a27d38d44a9d6cb95f4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Pod-Readme
 * [new ref]         1763f719d909eb2e85798a27d38d44a9d6cb95f4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1763f71 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild