$ git clone -n https://src.fedoraproject.org/rpms/perl-Net-Amazon.git /var/lib/mock/f45-build-25230-610/root/chroot_tmpdir/scmroot/perl-Net-Amazon
Cloning into '/var/lib/mock/f45-build-25230-610/root/chroot_tmpdir/scmroot/perl-Net-Amazon'...
$ git fetch origin 02d70c9c56193391a245d55766d841e48969f935:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Net-Amazon
 * [new ref]         02d70c9c56193391a245d55766d841e48969f935 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 02d70c9 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild