$ git clone -n https://src.fedoraproject.org/rpms/perl-Directory-Scratch.git /var/lib/mock/f45-build-23198-596/root/chroot_tmpdir/scmroot/perl-Directory-Scratch
Cloning into '/var/lib/mock/f45-build-23198-596/root/chroot_tmpdir/scmroot/perl-Directory-Scratch'...
$ git fetch origin 1c35eb11021a5264490828de753e552bd9bd9928:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Directory-Scratch
 * [new ref]         1c35eb11021a5264490828de753e552bd9bd9928 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1c35eb1 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild