$ git clone -n https://src.fedoraproject.org/rpms/perl-PatchReader.git /var/lib/mock/f45-build-25707-612/root/chroot_tmpdir/scmroot/perl-PatchReader
Cloning into '/var/lib/mock/f45-build-25707-612/root/chroot_tmpdir/scmroot/perl-PatchReader'...
$ git fetch origin 2c1c1ca7e7af5e05c193a048b90370ab1f23c6e0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-PatchReader
 * [new ref]         2c1c1ca7e7af5e05c193a048b90370ab1f23c6e0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2c1c1ca Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild