$ git clone -n https://src.fedoraproject.org/rpms/perl-Filesys-Notify-Simple.git /var/lib/mock/f45-build-23628-598/root/chroot_tmpdir/scmroot/perl-Filesys-Notify-Simple
Cloning into '/var/lib/mock/f45-build-23628-598/root/chroot_tmpdir/scmroot/perl-Filesys-Notify-Simple'...
$ git fetch origin 0ddc8adfd09e68f40c8b0538768175dfbdbdef3a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Filesys-Notify-Simple
 * [new ref]         0ddc8adfd09e68f40c8b0538768175dfbdbdef3a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0ddc8ad Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild