$ git clone -n https://src.fedoraproject.org/rpms/totem.git /var/lib/mock/f45-build-37334-714/root/chroot_tmpdir/scmroot/totem
Cloning into '/var/lib/mock/f45-build-37334-714/root/chroot_tmpdir/scmroot/totem'...
$ git fetch origin 612398e41ffe11a44d4e528b7a96813dac21f98e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/totem
 * [new ref]         612398e41ffe11a44d4e528b7a96813dac21f98e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 612398e Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild