$ git clone -n https://src.fedoraproject.org/rpms/fixedptc.git /var/lib/mock/f45-build-9000-397/root/chroot_tmpdir/scmroot/fixedptc
Cloning into '/var/lib/mock/f45-build-9000-397/root/chroot_tmpdir/scmroot/fixedptc'...
$ git fetch origin 01908a175183e55aefb42ac8ece6ed478c7f5143:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/fixedptc
 * [new ref]         01908a175183e55aefb42ac8ece6ed478c7f5143 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 01908a1 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild