$ git clone -n https://src.fedoraproject.org/rpms/fetchmail.git /var/lib/mock/f40-build-1996350-44005/root/chroot_tmpdir/scmroot/fetchmail
Cloning into '/var/lib/mock/f40-build-1996350-44005/root/chroot_tmpdir/scmroot/fetchmail'...
$ git fetch origin 51a5e86aed82d50dc794f4e287fef25a4571be03:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/fetchmail
 * [new ref]         51a5e86aed82d50dc794f4e287fef25a4571be03 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 51a5e86 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild