$ git clone -n https://src.fedoraproject.org/rpms/icecream.git /var/lib/mock/f39-build-1578762-38006/root/chroot_tmpdir/scmroot/icecream
Cloning into '/var/lib/mock/f39-build-1578762-38006/root/chroot_tmpdir/scmroot/icecream'...
$ git fetch origin 55c9310e4807dde39326320270b7739aea4c89e1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/icecream
 * [new ref]         55c9310e4807dde39326320270b7739aea4c89e1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 55c9310 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild