$ git clone -n https://src.fedoraproject.org/rpms/perl-Test-Compile.git /var/lib/mock/f45-build-26562-618/root/chroot_tmpdir/scmroot/perl-Test-Compile
Cloning into '/var/lib/mock/f45-build-26562-618/root/chroot_tmpdir/scmroot/perl-Test-Compile'...
$ git fetch origin b2d4dbd7042a938a432fdc9c8e4a3c630f37447e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Test-Compile
 * [new ref]         b2d4dbd7042a938a432fdc9c8e4a3c630f37447e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b2d4dbd Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild