$ git clone -n https://src.fedoraproject.org/rpms/perl-Color-Calc.git /var/lib/mock/f39-build-1434909-31959/root/chroot_tmpdir/scmroot/perl-Color-Calc
Cloning into '/var/lib/mock/f39-build-1434909-31959/root/chroot_tmpdir/scmroot/perl-Color-Calc'...
$ git fetch origin c4cb99eb4a78b7249f07c4be3d4c0d562bfe7898:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Color-Calc
 * [new ref]         c4cb99eb4a78b7249f07c4be3d4c0d562bfe7898 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c4cb99e Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild