$ git clone -n https://src.fedoraproject.org/rpms/perl-Text-Haml.git /var/lib/mock/f45-build-27013-620/root/chroot_tmpdir/scmroot/perl-Text-Haml
Cloning into '/var/lib/mock/f45-build-27013-620/root/chroot_tmpdir/scmroot/perl-Text-Haml'...
$ git fetch origin 6778c012c6344aa8446d94501d6baeffa0ff6b3c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Text-Haml
 * [new ref]         6778c012c6344aa8446d94501d6baeffa0ff6b3c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6778c01 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild