$ git clone -n https://src.fedoraproject.org/rpms/perl-Devel-Timer.git /var/lib/mock/f45-build-23128-596/root/chroot_tmpdir/scmroot/perl-Devel-Timer
Cloning into '/var/lib/mock/f45-build-23128-596/root/chroot_tmpdir/scmroot/perl-Devel-Timer'...
$ git fetch origin a0274928c6534ee9c67008a18a5697b4846811e6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Devel-Timer
 * [new ref]         a0274928c6534ee9c67008a18a5697b4846811e6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a027492 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild