$ git clone -n https://src.fedoraproject.org/rpms/perl-Module-Install.git /var/lib/mock/f40-build-2019019-46482/root/chroot_tmpdir/scmroot/perl-Module-Install
Cloning into '/var/lib/mock/f40-build-2019019-46482/root/chroot_tmpdir/scmroot/perl-Module-Install'...
$ git fetch origin 21e399a47034752cb1c1d4c38e9deed12dff573d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Module-Install
 * [new ref]         21e399a47034752cb1c1d4c38e9deed12dff573d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 21e399a Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild