$ git clone -n https://src.fedoraproject.org/rpms/perl-Authen-OATH.git /var/lib/mock/f45-build-21796-588/root/chroot_tmpdir/scmroot/perl-Authen-OATH
Cloning into '/var/lib/mock/f45-build-21796-588/root/chroot_tmpdir/scmroot/perl-Authen-OATH'...
$ git fetch origin 3023f679d831dc87d62f48344905ccc7f32e9f26:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Authen-OATH
 * [new ref]         3023f679d831dc87d62f48344905ccc7f32e9f26 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3023f67 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild