$ git clone -n https://src.fedoraproject.org/rpms/perl-Test-Email.git /var/lib/mock/f45-build-26644-618/root/chroot_tmpdir/scmroot/perl-Test-Email
Cloning into '/var/lib/mock/f45-build-26644-618/root/chroot_tmpdir/scmroot/perl-Test-Email'...
$ git fetch origin 471704ad12bec3c6c65d8ca0ef105e924fa58512:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Test-Email
 * [new ref]         471704ad12bec3c6c65d8ca0ef105e924fa58512 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 471704a Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild