$ git clone -n https://src.fedoraproject.org/rpms/mongoose.git /var/lib/mock/f39-build-1461963-33292/root/chroot_tmpdir/scmroot/mongoose
Cloning into '/var/lib/mock/f39-build-1461963-33292/root/chroot_tmpdir/scmroot/mongoose'...
$ git fetch origin 8ef8f30f611dbd20102e5c3895d4907199780a51:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mongoose
 * [new ref]         8ef8f30f611dbd20102e5c3895d4907199780a51 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8ef8f30 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild