$ git clone -n https://src.fedoraproject.org/rpms/perl-URI-Nested.git /var/lib/mock/f45-build-27306-622/root/chroot_tmpdir/scmroot/perl-URI-Nested
Cloning into '/var/lib/mock/f45-build-27306-622/root/chroot_tmpdir/scmroot/perl-URI-Nested'...
$ git fetch origin 288c5947afc963114203bc07356b0fa67ef00f5d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-URI-Nested
 * [new ref]         288c5947afc963114203bc07356b0fa67ef00f5d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 288c594 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild