$ git clone -n https://src.fedoraproject.org/rpms/perl-Math-Random-MT-Auto.git /var/lib/mock/f39-build-1553526-36989/root/chroot_tmpdir/scmroot/perl-Math-Random-MT-Auto
Cloning into '/var/lib/mock/f39-build-1553526-36989/root/chroot_tmpdir/scmroot/perl-Math-Random-MT-Auto'...
$ git fetch origin 8451d8a901970e430aa48603595f401b2bd2d049:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Math-Random-MT-Auto
 * [new ref]         8451d8a901970e430aa48603595f401b2bd2d049 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8451d8a Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild