$ git clone -n https://src.fedoraproject.org/rpms/perl-Text-Context-EitherSide.git /var/lib/mock/f45-build-26935-620/root/chroot_tmpdir/scmroot/perl-Text-Context-EitherSide
Cloning into '/var/lib/mock/f45-build-26935-620/root/chroot_tmpdir/scmroot/perl-Text-Context-EitherSide'...
$ git fetch origin 6fd495d754ddb835a692973e21fbcc20dfa94d1e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Text-Context-EitherSide
 * [new ref]         6fd495d754ddb835a692973e21fbcc20dfa94d1e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6fd495d Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild